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Medical Word Parts For: a

Word PartDefinitionCategory
A&Dascending & descendingDirectional
A&Walive and well
a-no, not, without, away fromgeneral
A-Panterior-posterior Directional
aa.arteries Cardiovascular
AAAabdominal aortic aneurysm cardiovascular
AADantibiotic associated diarrheadigestive
AALanterior axillary lineDirectional
ab-away fromdirectional
abdabdominal/abdomen Digestive
abdomenThe part of the body cavity below the thorax. General
abdomin-abdomendigestive
abdominal aortaThe part of the descending aorta passing through the diaphragm into the abdomen.cardiovascular
abdominal painDiscomfort, distress, or agony in the abdominal cavity. Can be acute or chronic. A significant clinical symptom. Digestive
abdominal quadrantsFour segments of the abdomen divided by horizontal and vertical lines intersecting at the umbilicus.Digestive
abdominal thrustsA maneuver for treating choking by using quick, forceful thrusts of fisted hands upward and inward toward the diaphragm. Commonly known as the Heimlich maneuver.Respiratory
abdominal wallThe boundaries of the abdomen, consisting of multiple layers: skin, subcutaneous fat, superficial fascia, muscles, transversalis fascia, extra peritoneal fat, and the parietal peritoneum. Extends from the thoracic cage to the pelvis. Digestive
abdominoplastySurgical removal of excess abdominal skin and fat and tightening of the abdominal wall. Commonly called a tummy tuck.Digestive
abducens nerveA small cranial nerve which originates in the pons and sends motor fibers to the lateral rectus muscles of the eye. It provides horizontal eye movement control. Eyes and Ears
abductionMovement of a limb away from the midline or axis of the body.muscular
aberrationA deviation from a normal condition or behavior.General
ABGarterial blood gas respiratory
ABIankle-brachial index cardiovascular
ablat/oto remove, to destroygeneral
ablationRemoval of tissue by vaporization, abrasion, freezing or other methods.urinary
ablation techniquesRemoval or disabling of body tissue by using hot liquids, microwave thermal heating, freezing, chemical ablation, and laser photoablation. General
ablutionWashing the body.General
ABNabnormalgeneral
ABOthree basic blood groups cardiovascular
abo blood groupA major blood classification system based on the presence or absence of two antigens, A and B. Type O occurs when neither A nor B is present and AB when both are present. A and B are genetic factors that determine the presence of enzymes for the synthesis of certain glycoproteins mainly in the red cell membrane. Cardiovascular
abortifacientAn agent, usually a medication, that causes abortion.Reproductive
aBParterial blood pressurecardiovascular
abrad/oto scrape, to wear awaygeneral
abreactionAn emotional release after recollection of a repressed experience.General
abscessAccumulation of purulent material in tissues, organs, or circumscribed spaces, usually associated with signs of infection. General
absenteeismChronic absence from work, school or other duties.General
absorptionThe processes by which substances, tissue, cells, etc. take up or take in other substances or energy. General
abstractA summary of the facts, ideas and opinions presented in articles, studies, literature or presentations.General
ACadrenal cortexendocrine
-acpertaining togeneral
AC (2)anticoagulentcardiovascular
ac (3)before a meal
acanth/othorny, sharp spinegeneral
acanthocytesErythrocytes with spiny projections giving the cell a thorny appearance. Cardiovascular
acar/omitesgeneral
acarboseA drug prescribed in treating type 2 diabetes mellitus. It retards the digestion of complex carbohydrates. Digestive
acaridaeFamily of mites frequently found in grain and flour. General
accelerated idioventricular rhythmA type of automatic, not reentrant, ectopic ventricular rhythm with episodes lasting from a few seconds to a minute. The ventricular rate is 50 to 100 beats per minute.Cardiovascular
accelerationA change in an object's rate of speed or direction. General
accessory nerveEither of two cranial nerves which are important for swallowing, speech and some head and shoulder movements.Nervous
acclimatizationAdaptation of an organism to a new or changing environment. General
accreditationCertification for voluntary compliance with standards established by non-governmental organizations.General
acculturationProcess of accepting or assimilating cultural change.General
ACE InhibitorDrug that lowers BP by inhibiting angiotensin converting enzyme (ACE) allowing increased blood flowCardiovascular
acebutololA beta blocker drug used to treat high blood pressure, irregular rhythms and angina pectoris.Cardiovascular
acetabulumConcave surface of pelvis where the head of the femur liesskeletal
aceticHaving a sour property of vinegar or acetic acid.General
acetoneA colorless liquid used as a solvent and an antiseptic. Present in urine.General
achilles tendonThe tendon connecting the muscles in the back of the calf to the calcaneus (heel bone). Muscular
achlorhydriaAbsence of hydrochloric acid in gastric secretion. Digestive
achondroplasiaA disorder that is a form of short-limb dwarfism.Skeletal
acid etchingPreparation of tooth surfaces with etching agents, such as phosphoric acid, to roughen the surface to increase adhesion. Skeletal
acid-base balanceThe balance between acids and bases in the body fluids. The pH of the arterial blood provides an index for the total body acid-base balance. General
acid/oacid, sour, bitterGeneral
acidosisA pathologic condition of acidity in body fluids and tissues. The two main categories are respiratory and metabolic acidosis.General
ACLSadvanced cardiac life support cardiovascular
acneA common inflammation of the sebaceous glands and hair follicles. Integumentary
acne conglobataSevere, chronic acne characterized by large, burrowing abscesses associated with disfigurement. Also called cystic acne.Integumentary
acne keloidA disorder in which secondary pyogenic infection in and around pilosebaceous structures ends in keloid scarring. Often develops at the hairline on the back of the neck.Integumentary
acou-heareyes and ears
acquired immunodeficiency syndromeAn acquired defect of T-cell immunity associated with infection by the human immunodeficiency virus (HIV).lymphatic
acr/oextremities, topendocrine
acrodermatitisChronic inflammation of the skin of the hands and feet. Caused by a parasitic mite. A manifestation of Lyme disease.Integumentary
acromegalyA hormonal disorder that results when the pituitary gland produces excess growth hormone.endocrine
acromioclavicular jointThe gliding joint formed by the outer extremity of the clavicle and the inner margin of the acromion process of the scapula. This joint has six ligaments.Skeletal
acromionThe lateral extension of the spine of the scapula and the highest point of the shoulder. Skeletal
acrophobiaFear of heightsnervous
acrosomeThe cap-like structure covering the anterior portion of spermatozoon. It contains enzymes necessary for sperm penetration of the egg. Reproductive
act-drive, do, actGeneral
ACTHadrenocorticotropic hormone endocrine
actin/oradiation, raygeneral
actinic keratosisPre-cancerous patch of thick, scaly, or crusty skin secondary to extensive sun exposureintegumentary
actinomycosisA chronic bacterial disease, often found on the abdomen, thorax and jaw. Characterized by lumpy, deep abscesses that discharge pus.Integumentary
actomyosinA protein complex of actin and myosin occurring in muscle. It is the essential contractile substance of muscle. Muscular
acu-needlegeneral
acupunctureTherapy for treating pain and disease by inserting needles along specific pathways or meridians. Nervous
acutesevere; sudden in onset; lasting a short timegeneral
acute respiratory distress syndromeA lung condition that causes low oxygen levels in the blood. It can be life threatening.Respiratory
ADAlzheimer disease nervous
-adtoward, in the direction ofgeneral
ad-toward, increasedirectional
adams-stokes syndromeRecurring fainting spells caused by incomplete heart block.Cardiovascular
ADDattention deficit disordernervous
Addison diseaseA rare disorder in which the adrenal glands do not produce enough of the hormones cortisol and/or aldosterone.endocrine
adductionMovement of a limb toward the midline or axis of the bodymuscular
adductorA muscle that moves a body part toward the midline or axis of the body.Muscular
aden/oglandendocrine
adenitisInflammation of a lymph node resulting in swelling or pain.Lymphatic
adenocarcinomaA malignant epithelial tumor with a glandular growth pattern. Integumentary
adenoid/oadenoidscardiovascular
adenoidectomySurgical removal of the adenoids. Respiratory
adenoidsA collection of lymphoid nodules on the posterior wall and roof of the nasopharynx.. lymphatic
adenomaA benign epithelial tumor with a glandular structure Lymphatic
adenovirusVirus responsible for upper respiratory tract infections, conjunctivitis, cystitis or GI infection.Lymphatic
ADHantidiuretic hormone endocrine
ADHDattention deficit-hyperactivity disorder nervous
adhesionBands of scar tissue that can develop after surgery.muscular
adip/ofatgeneral
adiposeConnective tissue composed of fat cells.General
adiposityThe amount of fat or lipid deposit at a site or an organ.General
adjustment disordersMaladaptive reactions to a stressful event.Nervous
ADLactivities of daily livingmuscular
adnexaAppendages of an organ (e.g. eyelids to the eyeball)eyes and ears
adolescenceA period beginning with puberty and ending at maturity. Usually from 11-13 years of age and ending at 18-20 years of age.General
adren/oadrenal glandsendocrine
adrenalPertaining to the adrenal glands, which are located atop of the kidneys. General
adrenalectomySurgical removal of one or both adrenal glands.endocrine
adrenalitisInflammation of the adrenal glands, endocrine
adrenarcheA development stage when the adrenal glands mature, leading to the increased production of adrenal androgens, dehydroepiandrosterone and androstenedione. Adrenarche usually begins at about 7 or 8 years of age before the signs of puberty and continues throughout puberty. Reproductive
adrenergic fibersNerve fibers liberating catecholamines at a synapse after an impulse. Nervous
adrenergic neuronsNeurons whose primary neurotransmitter is epinephrine. Nervous
adsorptionThe adhesion of gases, liquids, or dissolved solids onto a surface.General
adultA person having attained maturity.General
advanced cardiac life supportThe use of sophisticated methods and equipment to treat cardiopulmonary arrest. Advanced Cardiac Life Support (ACLS) includes the use of specialized equipment to maintain the airway, early defibrillation and pharmacological therapy. Cardiovascular
adventitiaThe outermost covering of organs, blood vessels and other structures not covered by serosa.General
AEabove elbowDirectional
AEDautomated external defibrillatorcardiovascular
aer-airgeneral
aerobicsSustained strenuous exercise that improves cardiovascular and respiratory fitness.Muscular
aerophagiaExcessive swallowing of air.digestive
aerophagyExcessive swallowing of air caused by anxiety or improper eating habits.Digestive
AFatrial fibrillation cardiovascular
AFBacid-fast bacillus respiratory
affectThe emotional reaction to an experience or thought. Nervous
Afibatrial fibrillation cardiovascular
afibrinogenemiaA deficiency or absence of fibrinogen in the blood. Cardiovascular
AFPalpha-fetoprotein reproductive
afterbirthThe placenta, umbilical cord and membranes that are expelled from the uterus after birthReproductive
aftercareHealth care provided to a patient after discharge.General
ageusiaLoss of the sense of taste.Digestive
agglutin/oclumpingCardiovascular
aggressionForceful verbal or physical behavior, or an overt attitude of hostility.General
agit/orapidity, restlessnessgeneral
agnosiaThe inability to comprehend or recognize the importance of various forms of stimulation.Nervous
-agoguesimulator, agent causing changegeneral
agonalRelating to conditions and struggles preceding death.General
agonisticA muscle whose contraction causes movement of a body part. Also, a drug that combines with receptors to produce an action.General
agoraphobiaObsessive, intense fear of open places or leaving home.. General
-agrasevere painnervous
agraphiaInability to write due to a cerebral injury or less commonly, due to emotional factors.Nervous
AHAAmerican Hospital Association
AHFantihemophilic factor cardiovascular
AIDSacquired immunodeficiency syndrome lymphatic
AIHAautoimmune hemolytic anemiacardiovascular
airThe mixture of gases present in the earth's atmosphere consisting of oxygen, nitrogen, carbon dioxide, and small amounts of other gases. General
air sacsThin-walled spaces including the alveoli connected to one terminal bronchiole.Respiratory
airwayTubular passages in the lungs through which air passes during breathing.Respiratory
AIVRaccelerated idioventricular rhythmcardiovascular
AKabove the knee Directional
akinetic mutismA syndrome characterized by a silent and inert state without voluntary motor activity despite alertness.Nervous
Alaluminum general
-alrelating togeneral
alacrimaDry eye.Eyes and Ears
albin/owhite, deficient pigmentationgeneral
albinismGenetic disorders causing the skin, hair, or eyes to have little or no color. integumentary
albuminProteins found in egg whites, milk, blood, lymph, and other tissues and fluids. They are water soluble and coagulate upon heating. General
albuminuriaThe presence of albumin in the urine, an indicator of kidney diseases. Endocrine
albuterolA short-acting beta-2 adrenergic agonist that is primarily used as a bronchodilator agent to treat asthma. Respiratory
alcoholismA primary, chronic disease creating a physical dependence on alcohol. Genetic and environmental factors influence its development.General
aldosteroneA hormone secreted by the adrenal cortex that acts on the kidneys to regulate electrolyte and water balance.Endocrine
aldosteronismA disease that causes the adrenals to produce too much of the hormone aldosterone.endocrine
alexiaInability to read despite preservation of the ability to write. The patient cannot recognize letters and words.Nervous
ALFassisted living facility
-algesiapainnervous
-algiapaingeneral
algidCold, clammy skin associated with some types of malaria.Integumentary
alginateA salt of alginic acid extracted from marine kelp. Used for surgical dressings. General
algorithmA step-by-step protocol for managing health care problems.General
alienationLack of meaningful relationships with others, leading to estrangement.General
aliment/onutritionDigestive
alimentary canalThe passage for the digestion and absorption of food. Extends from mouth to anus.digestive
alkaloidsOrganic nitrogenous bases produced by plants and used to create important, powerful drugs.General
alkalosisA condition of high alkalinity of blood and other body fluids. General
ALLacute lymphocytic leukemia lymphatic
allergenAntigen-type substance that produce immediate hypersensitivity.lymphatic
allergyHypersensitive reaction to common substances that are in the environment or digested. Also, an acquired sensitivity to certain drugs.General
allied health personnelHealth care workers specially trained and licensed to provide patient services in specialties such as physical therapy, laboratory sciences, dental hygiene and emergency services.General
allo-othergeneral
alloantigenAn antigen that occurs in some but not all members of a species.General
allograftTissues, cells, or organs transplanted between genetically different individuals of the same species. General
allopathyA medical therapy system in which a disease is treated by creating a second condition in the body that opposes the disease.General
allopurinolA xanthine oxidase inhibitor that decreases uric acid production. Used to treat gout and kidney stones.Endocrine
aloeThe dried juice of aloe plant leaves. Used to treat minor wounds, burns and skin irritations.Integumentary
alopeciaA disorder in which the immune system attacks hair follicles in the scalp.integumentary
alphavirusA group of small Toga viruses. Can be transmitted from mosquitoes to humans, causing several types of encephalitis.General
alprazolamA compound used to treat anxiety.Nervous
alprostadilA potent vasodilator agent that increases peripheral blood flow. Cardiovascular
altitude sicknessMultiple symptoms associated with reduced oxygen at high altitude. These symptoms include headache, nausea, fatigue, difficulty sleeping, tachycardia and shortness of breath. General
alve-channel, cavityGeneral
alveol/oalveolusrespiratory
alveoliAir sacs in the lung which allow exchange of blood oxygen and carbon dioxide.Respiratory
alveolitisAn inflammation of the alveoli. Caused by inhalation of an allergen.Respiratory
Alzheimer diseaseType of dementia that causes problems with memory, thinking, and behavior.nervous
AMmorning
AMAAmerican Medical Association
amalgamA mixture of mercury, silver and other metals used in dentistry.General
amanitaA genus of mushrooms. Some species are poisonous.General
amantadineAn antiviral agent used to treat influenza A. Also used as an antiparkinsonian agent.General
amaurosisPartial or complete blindness caused by a disease.Eyes and Ears
amberA hard, yellowish fossil resin from pine trees.General
ambi-both, both sides, arounddirectional
ambientPertaining to the environment of an organism or mechanism.General
ambivalenceConflicting feelings or attitudes towards a person, object or idea.General
ambly/odull, dimEyes and Ears
amblyopiaDecrease of vision due to abnormal development during childhood. Also known as lazy eye.eyes and ears
ambul/owalkinggeneral
ambulanceA vehicle for transporting patients for treatment.General
ambulatoryAble to walk.General
amebaA large genus of protozoa found in water and moist conditions. Several species may be parasitic in humans.General
amebiasisInfection with ameba. Widespread condition in tropical countries.. An asymptomatic condition in most people but diseases ranging from diarrhea to dysentery. General
amebicideA drug or other agent which destroys ameba, particularly parasitic species.General
ameloblastomaA fast growing epithelial tumor of the jaw.General
amelogenesisThe formation of dental enamel by ameloblasts.General
amenorrheaAbsence of menstruation.reproductive
ametropiaAn eye problem caused by faulty refraction.eyes and ears
AMIacute myocardial infarction cardiovascular
amino acidA group of organic compounds that contain an amino and a carboxyl group.General
aminoglycosideAntibiotic that prevents bacteria from producing proteins. Requires monitoring due to side-effects.General
aminophyllineA bronchodilator. Used to treat asthma and COPD.Respiratory
AMLacute myelogenous leukemia lymphatic
amnesiaLoss of memory due to brain injury or emotional trauma.Nervous
amni/oamnion, sac around embryoreproductive
amniocentesisDiagnostic test for chromosomal abnormalities and fetal infections. A small amount of fluid is removed from the amniotic sac.reproductive
amniotic fluidA clear, yellowish liquid that surrounds the fetus, protecting it from injury.Reproductive
amobarbitalA barbiturate sedative-hypnotic.General
amoxicillinAn oral semisynthetic penicillin antibiotic. General
ampereA measure of electrical current. One ampere (amp) is equal to the current flowing through a one ohm resistance when an electrical potential of one volt is applied.General
amphetamineA powerful group of drugs that stimulate the central nervous system. Amphetamines reduce feelings of fatigue and increase alertness.Nervous
amphi-both sidesGeneral
ampho-both sides, doubleGeneral
ampicillinSemisynthetic penicillin that functions as a broad-spectrum antibiotic. General
amputationThe removal of a limb or other body appendage.Skeletal
amyl-starchDigestive
amylaseA group of enzymes that help digest starches.Digestive
amyloidStarch-like.General
amyloidosisA group of infectious diseases cause abnormal protein folding and deposition of amyloid. These amyloid deposits can enlarge and displace normal tissue, impairing function.General
amyloseThe soluble constituent of starch.Digestive
amyotrophic lateral sclerosisA neurological disease causing muscle weakness and impacting physical function. Commonly called ALS.nervous
-anpertaining togeneral
an-not, without, away fromgeneral
an/oanus, ringdigestive
ANAantinuclear antibody lymphatic
ana-up, apart, againdirectional
anabolic steroidA compound derived from testosterone or synthetically that stimulates development of muscle mass, strength, and power. General
anacrotismA secondary notch in the pulse curve, obtained in a pulse tracing.Cardiovascular
anaerobicTaking place without oxygen.Cardiovascular
anal canalThe terminal segment of the large intestine ending at the anus. Digestive
analgesiaWithout pain or decreased pain.Nervous
analgesicsA compound that relieves pain. Nervous
anaphylaxisA severe immune system reaction to a previously encountered antigen. Can sometimes be fatal.lymphatic
anaplasiaLoss of structural differentiation and useful function of neoplastic cells. Typical of malignant tumors.General
anasarcaMassive swelling (edema) of the legs, truck and genitalia. Occurs in congestive heart failure, renal disease or liver failure.General
anastomosisA surgical connection between two structures.digestive
anatomyThe study of the structure of organisms. General
anconeusA small triangular muscle behind the elbow. Its function is to extend the forearm.Muscular
andr/omalereproductive
andro-malegeneral
androgenSteroid hormones that stimulate development of male reproductive organs, beard growth, voice changes and muscles. Reproductive
androidPertaining to something human.General
andropauseMale menopause.reproductive
androsteroneA metabolite of testosterone or androstenedione.Reproductive
anemiaBlood lacks enough erythrocytes (RBC) or hemoglobin.Cardiovascular
aneroid A kind of barometer operated by the movement of the elastic lid of a box exhausted of air.General
anesthesiaThe loss of feeling or sensation, particularly pain. Nervous
anesthesiologyA specialty concerned with the study of anesthetics and anesthesia. Nervous
anestheticMedication that causes temporary loss of sensation.nervous
anestheticsAgents that are capable of inducing a total or partial loss of sensation, especially tactile sensation and pain. They may act generally or locally.Nervous
anetodermaBenign dermatosis caused by a loss of dermal elastic tissue resulting in localized sac-like areas of flaccid skin.Integumentary
aneurysmA sac-like dilatation of a blood vessel wall. It indicates a weak spot in the wall which may rupture. Cardiovascular
angerA strong emotional feeling of displeasure aroused by being interfered with, injured or threatened. Nervous
angi/oblood or lymph vesselcardiovascular
angina pectorisChest pain, pressure, or squeezing, often due to ischemia of the heart muscle.Cardiovascular
angiocardiographyRadiography of the heart and great vessels after injection of a contrast medium. Cardiovascular
angioedemaSwelling involving the deep dermis, subcutaneous, or submucosal tissues, representing localized edema. It often occurs in the face, lips, tongue, and larynx. Integumentary
angiographyAn x-ray study of blood vessels after injection of a contrast medium. Cardiovascular
angiokeratomaA benign vascular, horny neoplasm of the skin often found on the legs and feet. Integumentary
angiomaA usually benign tumor consisting of blood vessels and lymph nodes.Integumentary
angiomyomaA benign tumor consisting of vascular and smooth muscle elements. Integumentary
angioplastyRepair of a blood vessel such as widening a narrowed artery or vein. This procedure is normally performed using catheterization. Cardiovascular
angioscopeAn endoscope used for viewing the interior of blood vessels. Cardiovascular
angiostenosisAbnormal narrowing of a blood vessel.Cardiovascular
angiotensinA family of peptides in the blood that causes vasoconstriction and increased blood pressure.Cardiovascular
angstromA unit of length equal to 0.1 nanometer.General
anhedoniaInability to experience happiness or pleasure. It is a symptom of many psychotic disorders. Nervous
anhidrosisAbsence of sweating in an environment appropriate for sweating.General
anionNegatively charged ion. General
anis-unequalgeneral
anisocoriaUnequal pupil sizes. Affects 20% of the population.eyes and ears
ankleThe region between the foot and leg. Skeletal
ankle brachial indexThe ankle-arm index. This is the ratio of the higher of the two ankle systolic blood pressures divided by the higher of the two arm systolic pressures. It is a predictor of peripheral arterial disease. Cardiovascular
ankyl/obent, stiffskeletal
ankylosisFixation and immobility of a joint. skeletal
anodontiaCongenital absence of most or all teeth.Skeletal
anomal/oirregulargeneral
anomalyA variation from normal, particularly congenital defectGeneral
anomiaAn inability to name people and objects that are correctly comprehended.Nervous
anorexiaThe lack or loss of appetite with an inability to eat.General
anorexia nervosaAn eating disorder characterized by a loss of appetite and an excessive fear of becoming overweight.digestive
anosmialoss or impairment of the sense of smell. It can be temporary or permanent.General
anovulationSuspension or cessation of ovulation by the ovaries.Reproductive
anoxiaAbsence of oxygen in body tissues despite adequate blood flow.Respiratory
ant.anterior Directional
antacidsSubstances that neutralize acidity in the stomach. Digestive
antagonistA person, muscle or drug that opposes another.General
antazolineA short acting antihistamineGeneral
ante-forward, beforedirectional
antegradeMoving forward or moving in the direction of blood or urine flow.General
antepartal careHealth care provided during pregnancy.Reproductive
anter/ofrontdirectional
anteriorfrontdirectional
anterior chamberThe space between the cornea and the iris, filled with aqueous humor.Eyes and Ears
anterior cruciate ligamentA strong ligament of the knee that extends from the anterior intercondylar area of the tibia to the posterior part of the medial surface of the lateral condyle of the femur. Responsible for controlling stability during knee rotation.Skeletal
anthelminticsAgents that destroy or prevent development of parasitic worms. Digestive
anthrac/ocarbon, coalgeneral
anthracosisA chronic lung disease caused by inhaled coal dust. Occurs in coal miners but also in tobacco smokers. Respiratory
anthraxAn acute infectious disease of hoofed animals and humans. Infection in humans often involves the skin , lungs or gastrointestinal tract.Respiratory
anthrop/ohuman lifegeneral
anti-againstlymphatic
anti-inflammatoryReducing inflammation.General
antibioticsAn infection fighting protein made by blood plasma cells in response to an antigen. It helps destroy bacteria, viruses and toxins. lymphatic
antibodiesImmunoglobulin molecules produced in lymphoid tissue that attack the antigen that induced their synthesis.Lymphatic
antibodyProtein produced by B cells as primary immune defense.lymphatic
anticoagulantsAgents that slow coagulation and prevent blood clotting. Cardiovascular
anticonvulsantsDrugs used to prevent seizures or reduce their severity. Nervous
antidepressantsDrugs that prevent or relieve depression.Nervous
antidiabeticDrugs that help control diabetes mellitus.Endocrine
antidiarrhealA drug or food for treating diarrhea.Digestive
antidiuretic hormoneA hormone produced by the hypothalamus and stored in the pituitary gland. This hormone controls the amount of water excreted in the urine.endocrine
antidromicConducting nerve impulses in a direction opposite from normal.Nervous
antiemeticsDrugs used to prevent nausea or vomiting. Digestive
antifibrinolyticPreventing the breakdown of a blood clot or thrombus.Cardiovascular
antifungalSubstances that destroy fungi.lymphatic
antigenSubstances that are recognized by the immune system and induce an immune reaction.lymphatic
antigensSubstances that are recognized by the immune system and induce an immune reaction. Lymphatic
antihistamineAn agent that inhibits the actions of a histamine.General
antihypertensiveDrugs used to reduce high blood pressure. Cardiovascular
antimitoticDrugs that arrest cell division.General
antioxidantSubstances that inhibit oxidation of a substance.General
antiparasiticA drug used to treat or prevent parasitic infections. General
antiperspirantsAgents that are put on the skin to reduce sweating. Integumentary
antipruriticAn agent that relieves itching. Usually topical.Integumentary
antipsychoticAn agent used to control severe mental disorders.Nervous
antipyreticA drug used to reduces fever. General
antisepsisThe destruction of germs causing disease. General
antisocial A personality disorder characterized by a disregard for individual rights or laws.Nervous
antispasmodicA drug used to treat smooth muscle spasms in the digestive system, uterus or urinary tract.Muscular
antithyroidAn agent used to treat hyperthyroidism. General
antitoxinsAntisera from immunized animals that is purified and used as a passive immunizing agent against specific bacterial toxins. General
antitussive agentsCough medicine that acts centrally on the medullary cough center.Respiratory
antiviralDestroying a virus or suppressing replication.Lymphatic
antr/oantrum, cavitygeneral
antrumA cavity or chamber.General
anuriaAbsence of urine formation.urinary
anusThe distal opening of the alimentary canal, lying in the fold between the buttocks.Digestive
anxietyFeeling or emotion of dread, apprehension, or fear without apparent stimulus. Nervous
anxiety disordersA group of mental disorders characterized by feelings of anxiety and fear.muscular
Aoaorta cardiovascular
AODMadult-onset diabetes mellitusendocrine
aort/oaortacardiovascular
aortaThe main trunk of the systemic arteries originating at the heart's left ventricle. Cardiovascular
aortic aneurysmAn abnormal balloon or sac-like dilatation in the aortic wall.Cardiovascular
aortic coarctationA congenital heart abnormality where the aorta is narrowed.Cardiovascular
aortic stenosisNarrowing of the aortic valve opening, reducing outflow from the left ventricle into the aorta.Cardiovascular
aortic valveThe valve between the left ventricle and the aorta. It prevents back flow of blood into the left ventricle. Cardiovascular
aortic valve regurgitationBack flow of blood from the aorta into the left ventricle. Cardiovascular
APAantipernicious anemia factorcardiovascular
apacheAn acronym for Acute Physiology and Chronic Health Evaluation, a scoring system used for classifying the severity of illness in critically ill patients. General
apathyLack of emotion or emotional expression; disinterest. Nervous
apexThe tip of an organ.General
Apgar scoreNewborn health assessment score (0-10).
Two points each: Appearance of skin color, Pulse, Grimace, Activity, Respiration.
reproductive
aphakiaAbsence of the eye's lens.eyes and ears
aphasiaImpairment of language or speech comprehension.nervous
-apheresisseparation, removalgeneral
aphoniaInability of the larynx to produce speech sounds. Respiratory
aphrodisiacAn agent that stimulates sexual desire.Reproductive
aphth/oulcergeneral
apic/oapexgeneral
apicalPertaining to the tip or apex of a structure.General
aplasiaDefective development of an organ or tissue.Reproductive
aplastic anemiaA condition in which bone marrow doesn't produce sufficient blood elements. Cardiovascular
apneaA temporary cessation of spontaneous respiration. Respiratory
apo-separate, away fromdirectional
apocrine glandsSweat glands that only occur in hairy parts of the body.Integumentary
apophysisAn outgrowth or projection from a bone.Skeletal
apoptosisProgrammed cell death resulting in the orderly removal of cells.General
append/oappendixdigestive
appendectomySurgical removal of the appendix.general
appendicitisAcute inflammation of the vermiform appendix. Digestive
appendixA worm-like blind tube extension from the cecum. Digestive
appetiteNatural recurring desire, e.g. for food. Digestive
apraxiaDisorders characterized by the inability to make skilled, purposeful movements due to a cerebral disease.Nervous
aprepitantA drug used to treat chemotherapy induced nausea.General
aptitude testsStandardized tests designed to predict an individual's learning ability or performance. Nervous
aqwater
aquaphobiaAn irrational fear of water.Nervous
aque/owatergeneral
aqueous humorThe clear, watery fluid circulating in the anterior and posterior chambers of the eye. Eyes and Ears
-arpertaining togeneral
arachnoidA delicate membrane covering the brain and spinal cord. It lies between the pia mater and the dura mater.Nervous
arachnoiditisAcute or chronic inflammation of the arachnoid membrane, resulting in pain and neurological abnormalities.Nervous
arborA tree-like structure with branching.General
arbovirusViruses transmitted by saliva of insects, bats and rodents.General
ARCAIDS-related complex lymphatic
arch-beginning, origin, firstgeneral
ARDSacute respiratory distress syndrome respiratory
areolaA ring of pigmented skin surrounding a nipple.reproductive
ARFacute renal failure urinary
argonAn odorless, colorless, inactive gas with atomic number 18.General
argyriaA permanent ashen-gray discoloration of the skin, conjunctiva, and internal organs due to ingestion of or exposure to silver salts.Integumentary
armThe superior part of the upper limb between the shoulder and the elbow. Skeletal
ARMDage-related macular degeneration Eyes And Ears
aromatherapyThe use of fragrances and plant oils to improve physical, mental, and emotional well-being. General
arousalA state of alertness due to stimulation.Nervous
arrhythmiaAbnormal heartbeat rhythm. To learn more, visit arrhythmia page at Practical Clinical Skills website.Cardiovascular
arsenicA shiny gray element with atomic symbol As, atomic number 33. Most forms are toxic.General
arteri/oarterycardiovascular
arterial blood gasesA test that measures the levels of oxygen, carbon dioxide and acidity (pH) in the blood. Some blood gases devices make additional measurements available. Cardiovascular
arteriesThe vessels carrying blood away from the heart. Cardiovascular
arteriol/osmall arterycardiovascular
arteriolesThe smallest divisions of the arteries located between the muscular arteries and the capillaries. Cardiovascular
arteriolosclerosisThickening of the walls of small arteries or arterioles.Cardiovascular
arteriosclerosisThickening and stiffening of arterial walls.Cardiovascular
arteriostenosisNarrowing of arterial walls.Cardiovascular
arteritisinflammation of one or more arteries. Cardiovascular
arthr/ojointskeletal
arthralgiaJoint pain.skeletal
arthritisInflammation of joints, characterized by pain, swelling and diminished range of motion.Skeletal
arthrocentesisAspiration of fluid (e.g., synovial fluid) from a joint cavity.Skeletal
arthrodesisThe surgical fixation of a joint by a procedure designed to accomplish fusion of the joint surfaces by promoting the proliferation of bone cells.skeletal
arthrographyImaging of a joint, usually after injection of a contrast medium. Skeletal
arthrolysisSurgical restoration of mobility in stiff, ankylosed joints.skeletal
arthroplastySurgical reconstruction of a joint to relieve pain or restore motion. Skeletal
arthropodA member of the phylum Arthropoda, composed of organisms having a hard, jointed exoskeleton and paired jointed legs. It includes insects, mites, ticks and spiders.General
arthroscopyExamination, therapy and surgery of a joint using an endoscope.skeletal
articul/ojointskeletal
articulationThe junction of two or more bones. Also, forming sounds into meaningful speech.Skeletal
artifactsAnything artificially made. An unwanted problem with a medical imaging technique.General
artificial limbsProsthetic replacements for arms and legs. Skeletal
-arypertaining togeneral
ASaortic stenosiscardiovascular
ASAacetylsalicylic acid
asbestosisLung disease characterized by interstitial fibrosis. Caused by inhalation of asbestos particles.Respiratory
ASCatypical squamous cells general
ASC-USatypical squamous cells of undetermined significance reproductive
ascitesAbnormal accumulation of free fluid within the peritoneal cavity. digestive
ascorbic acidA water soluble compound. As vitamin C, it naturally occurs in citrus fruits and many vegetables.Digestive
ASDatrial septal defect cardiovascular
-aseenzymegeneral
aspartameArtificial sweeter, metabolized as phenylalanine and aspartic acid. Digestive
asperger syndromeA developmental disorder whose essential features are persistent impairment in reciprocal social interactions, and restricted, repetitive patterns of behavior, interests, or activities and impairment in language and communications skills.Nervous
aspermiaA condition characterized by the complete absence of semen.Reproductive
asphyxiaCondition caused by lack of oxygen, leading to loss of consciousness and death. Causes include drowning, suffocation, choking and inhaling carbon monoxide.Respiratory
aspir/oinhalingrespiratory
aspirinAn analgesic, anti-inflammatory and antipyretic agent. It also reduces the risk of vascular thrombosis. General
assaultA violent physical or verbal attack.General
assertivenessStrongly insistent, self-assured behavior. Nervous
assimilationThe transformation of food into living tissue.Digestive
Astastigmatism Eyes And Ears
astasiaThe inability, without physical cause, to stand or sit without assistance.Muscular
asthen-weaknessmuscular
asthmaChronic bronchial inflammatory disorder. Characterized by breathing difficulty, wheezing, coughing and dyspnea.Respiratory
astigmatismA common and generally easily treatable imperfection in the curvature of the eye. eyes and ears
astr/ostarnervous
astringentA drug, usually topical, that cause the contraction of tissues. Used for controlling bleeding or secretions. General
astrocyteA large, star shaped cell. Found throughout the central nervous system.Nervous
astrocytomaA type of brain tumor.Nervous
asystoleComplete absence of cardiac output and electrical activity in the heart.Cardiovascular
ataxiaInability to coordinate voluntary muscle movements, not due to muscle weakness.muscular
atcaround the clock
atelectasisPartial or complete failure of a lung to expand due to alveoli deflation. Can occur after surgery, trauma, infections.Respiratory
ateliosisA form of dwarfism.Reproductive
atelo-incomplete, imperfectnervous
ather/oplaque, soft fatty depositcardiovascular
atherectomyEndovascular procedure for removing atheromatous plaque by a cutting or rotating catheter.Cardiovascular
atheromaA thickening and loss of elasticity of arterial walls due to plaque deposits. Also called atherosclerosis.Cardiovascular
atherosclerosisA thickening and loss of elasticity of arterial walls due to plaque deposits. Cardiovascular
athetosisSlow, continuous slow, flowing involuntary movements of the fingers, toes, tongue and face. Often a form of cerebral palsy. While impairing speech, intelligence in often unaffected.General
ATLadult T cell leukemialymphatic
atmosteam, vaporgeneral
atonicWithout normal muscle tone or strengthmuscular
atorvastatinA drug used to reduce the levels of cholesterol and triglycerides in the blood. Cardiovascular
atresiaThe absence or abnormal narrowing of a body opening or duct.General
-atresiaclosure, occlusionurinary
atreto-closedgeneral
atri/oatriumcardiovascular
atriaThe upper chambers of the heart which receive blood flow from the body.Cardiovascular
atrial fibrillationAbnormal cardiac rhythm characterized by rapid, uncoordinated firing of electrical impulses in the atria. Increases risk of stroke and heart disease.Cardiovascular
atrial flutterA very rapid, irregular heart rhythm. A common form of tachyarrhythmia. Cardiovascular
atrioventricular nodeA small group of specialized muscle fibers located on the floor of the right atrium. It regulates electrical signals to the ventricles, preventing rapid conduction and ensuring that the atria have emptied.Cardiovascular
atrium(of the heart). Either of the two upper chambers of the heart.Cardiovascular
atrophyDiminished size or wasting away of body tissue, for example muscles.muscular
attentionMentally focusing on a specific object, issue or activity. The act of concentrating. Nervous
attenuationThe reduction or dilution of disease producing ability.General
attitude1) A position or posture of the body. 2) A way or manner of behaving.General
attritionWearing away.General
atypicalUnusual. Not representative of a type or group.General
Augold general
audi/ohearingeyes and ears
audiologyThe study of hearing and hearing impairment. Eyes and Ears
audiometryA noninvasive test that measures the ability to hear different tones and intensities.eyes and ears
auditA formal review of data or records.General
augmentationThe process of increasing in size or amount.General
AULacute undifferentiated leukemiacardiovascular
aur/oeareyes and ears
auralRefers to the ear or hearing.eyes and ears
auranofinA drug for treating rheumatoid arthritis. Skeletal
auscauscultationcardiovascular
auscultationListening for body sounds usually with a stethoscope. General
autismA group of developmental disabilities that can cause significant social, communication and behavioral problems.nervous
auto-self, samegeneral
autoantibodyAn antibody that react with self-antigens of the organism that produced them. Lymphatic
autoantigensEndogenous tissue constituents that have the ability to interact with autoantibodies and cause an immune response. Lymphatic
autograftTransplant comprised of an individual's own tissue, transferred from one part of the body to another. General
autoimmuneDisorder of the immune system in which an immune response is created against the body's own tissues.Lymphatic
autoimmune disorderImmune system attacks on healthy cells by mistake.lymphatic
autoimmunityProcess whereby the immune system reacts against the body's own tissues.Lymphatic
autologousOne individual being both donor and recipient (e.g. blood).skeletal
autolysisThe disintegration of tissues or cells by intracellular enzymes. General
automatismAutomatic, mechanical, and apparently undirected behavior which is outside of conscious control. General
autonomicThe ability to function without external influence.Nervous
autonomic nervous systemThe part of the nervous system that regulates involuntary body functions. The enteric nervous system; parasympathetic nervous system; and sympathetic nervous system taken together.Nervous
autonomyAbility to function independently. Self-governing.General
autophagiaBiting or eating one's own flesh.Nervous
autopsyPostmortem examination of the body to determine the cause of death. General
autosomeAny chromosome that is not a sex chromosome and that occurs in pairs in somatic cells.General
autosuggestionSuggestion coming from the subject himself. Nervous
autotrophicSelf nourishing. The processes by which organisms use inorganic substances such carbon dioxide and inorganic nitrogen as nutrient sources. General
aux/ogrowthgeneral
AVatrioventricularcardiovascular
avascularAn area of the body lacking adequate blood vessels or blood supply.Cardiovascular
AVBatrioventricular blockcardiovascular
aversion therapyA treatment that suppresses undesirable behavior by simultaneously exposing the subject to unpleasant consequences. Nervous
avian influenzaA highly contagious disease of poultry and other birds, caused by strains of influenza A virus.General
avitaminosisDisease caused by vitamin deficiency.Digestive
avoidanceA psychological or physical defense mechanism for avoiding a noxious experience.Nervous
AVRaccelerated ventricular rhythmcardiovascular
axi/oaxisskeletal
axialPertaining to an axis.General
axill/oarmpitgeneral
axillaArmpit.Skeletal
axonNerve fiber that conduct impulses away from the neuron cell body. Nervous
azoospermiaA complete absence of sperm in the ejaculate.reproductive
azot/onitrogenUrinary
azotemiaA biochemical abnormality referring to an elevation of blood urea nitrogen and creatinine. General

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