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Medical Dictionary: e

TermDefinitionCategory
EaerosolsA liquid or particulate solution dispensed as a mist.General
earThe hearing and equilibrium system of the body. Sound vibration is transduced to nerve signals that pass through the acoustic nerve to the central nervous system. The inner ear contains the vestibular organ that responsible for equilibrium.Eyes and Ears
earachePain in the ear. Eyes and Ears
EBLestimated blood lossgeneral
ebola virusA virus causing acute, often fatal, infections. Transmitted from animals to humans and from human to human.General
ebstein anomalyA congenital heart defect characterized by third and fourth heart sounds and a systolic murmur best heard at the tricuspid position. The tricuspid valve is displaced downward and the right atrium is usually enlarged. Cardiovascular
EBVEpstein-Barr virus lymphatic
ec-outside, outgeneral
ecchymosisDiscolored skin due to subcutaneous bleeding larger than 1cm. Commonly called a bruise.integumentary
eccrine glandsSimple sweat glands that secrete sweat directly onto the skin. Integumentary
ECFextended care facility
ECGelectrocardiogram cardiovascular
echin/ospiny, pricklygeneral
ECHOechocardiography cardiovascular
echo-reflected soundgeneral
echocardiographyA noninvasive diagnostic procedure that uses ultrasound to study to structure and motions of the heart and blood flow.Cardiovascular
echoencephalographyThe use of ultrasound waves to study brain structures. nervous
echolaliaThe automatic and meaningless repetition of another person's spoken words.General
eclampsiaA toxic disorder characterized by convulsions and possibly coma during or immediately after pregnancyReproductive
ECMOextracorporeal membrane oxygenation respiratory
eco-environmentgeneral
ecotype A subspecies that is genetically adapted to a particular habitat.General
ECTelectroconvulsive therapy nervous
-ectasisdilation, stretchingurinary
ecto-out, outwarddirectional
ectomorphA slender, lean body type.General
-ectomyremoval, excisiongeneral
ectopic beatsHeartbeat electrical impulses generated from cardiac locations other than the SA node.Cardiovascular
ectopic pregnancyWhen a fertilized egg implants outside of the uterus.reproductive
ectr/ocongenital absencegeneral
ectropionA condition where the lower eyelid droops away from the eye and turns outwards.eyes and ears
eczemaInflammation of the skin. Multiple causes.integumentary
EDemergency department
ED (2)erectile dysfunctionreproductive
EDDestimated date of deliveryreproductive
edemaSwelling due to excess fluid in the body's tissues.general
-edemaswellinggeneral
EEGelectroencephalogram nervous
EENTeye, ear, nose, and throat Eyes And Ears
EFejection fraction cardiovascular
efferent pathwaysThe route of nerve structures carrying impulses away from a nerve center toward a peripheral site.Nervous
effusionThe escape of fluid.General
EGDesophagogastroduodenoscopy digestive
EGFepidermal growth factordigestive
eggA female reproductive cell prior to fertilization.Reproductive
egoThe part of a person that is conscious and thinks. The self.General
EIAexercise-induced asthmarespiratory
eideticPertaining to the ability to accurately visualize events or objects from experience.Nervous
ejaculationThe sudden emission of semen from the male urethra.Reproductive
ejection clickA sharp clicking sound heard during cardiac auscultation.Cardiovascular
ejection fractionThe portion of the total ventricular filling volume that is ejected during a heart beat.Cardiovascular
EKGelectrocardiogramcardiovascular
elasticityResistance and recovery from distortion of shape. General
elationThe feeling of euphoria, excitement, joyfulness, satisfaction and optimism.General
elbow jointA hinge joint connecting the forearm to the arm. Skeletal
ele/ooilgeneral
electric impedanceThe measure of the opposition that a circuit presents to a current when a voltage is applied.General
electro/oelectricitygeneral
electrocardiogramA recording of the electrical activity of the heart. Within each heartbeat, electrical waves travel through the heart. For a normally functioning heart, the P wave indicates atrial contraction, then after a short pause, the QRS complex indicates ventricular contraction and then a T wave marks the relaxation of the ventricles. EKGs are recorded on a chart paper, displayed on a monitor or digitally captured. Cardiovascular
electrocardiographyThe process of recording the electrical activity of the heart. Cardiovascular
electrochemistryThe study of combined electrical and chemical activity and changes. General
electrodeA conductor through which electric current enters or leaves a non-metallic medium.General
electroencephalographyA test to measure the electrical activity of the brain.nervous
electrolysisDestruction by using a galvanic electric current.Integumentary
electrolyteA substances that dissociates into two or more ions and can then conduct an electric current.Digestive
electrolytesMinerals in the blood and other body fluids that carry an electric charge.endocrine
electromyographyA test of the health of the muscles and the nerves that control the muscles.muscular
electronA stable elementary particle in orbit around an atom's nucleus.General
electrophoresisThe movement of charged particles in an electric field toward an electric pole.General
electrophysiologyThe study of the generation and behavior of electrical charges in living organisms particularly the nervous system and the effects of electricity on living organisms. General
electroplatingCoating with a metal or alloy by electrolysis. General
elementsEach of more than one hundred substances that cannot be chemically broken down into simpler substances and are primary constituents of matter.General
elephantiasisA condition characterized by gross enlargement of an area of the body,General
eliminationRemoval of waste products from the body.Digestive
ELISAenzyme-linked immunosorbent assay lymphatic
elixelixir
elliptocytosisCondition of having an abnormal number of elliptical red cells in the blood.Cardiovascular
elutriationThe removal, by means of a suitable solvent, of one material from another.General
Ememmetropia Eyes And Ears
emaciationAbnormal thinness caused by disease or a lack of nutrition.General
embalmingProcess of preserving a dead body to protect it from decay. General
embolectomyAn emergency surgical removal of an obstructing clot or foreign material.Cardiovascular
embolismA blood vessel blockage by a blood clot or other undissolved material in the bloodstream. Cardiovascular
embryoAny organism in the earliest stages of development.Reproductive
embryo-related to embryoreproductive
embryologyThe study of the development of an organism during the embryonic and fetal stages of life. Reproductive
-emesisvomitingdigestive
emeticsPertaining to or causing vomiting.Digestive
EMGelectromyographymuscular
-emiacondition of the bloodcardiovascular
emmetr/ocorrect measuregeneral
emmetropiaA state when rays are focused correctly on the retina of a relaxed eye.eyes and ears
emotionAny state of arousal in response to external events or memories.General
emphysemaA chronic lung disease characterized by decreased numbers of alveoli and eventual destruction of alveoli walls. Caused by genetic defects and smoking.Respiratory
empyemaPresence of pus in a hollow organ or body cavity. Abscess.General
EMSemergency medical service
en-in, withindirectional
enanti/oopposed, oppositegeneral
enarthrosisA ball and socket joint.Skeletal
encephal/obrainnervous
encephalitisA inflammation of the brain. Symptoms include headache, fever, vomiting, stiff neck and lethargy.nervous
encopresisThe loss of the ability to control bowel movements.Digestive
end-within, innergeneral
endarterectomyA surgical procedure to remove the plaque material in the lining of an artery.Cardiovascular
endarterialRelating to the interior lining of the artery.Cardiovascular
endarteritisInflammation of the inner endothelial lining of an artery. Cardiovascular
endemicPresent or usually prevalent in a population or geographical area at all times.General
endo-withindirectional
endocardi/oendocardium (inner lining of the heart)cardiovascular
endocardialSituated or occurring within the heart.Cardiovascular
endocarditisInflammation of the inner lining of the heart chamber and valves. Usually caused by bacterial infection.Cardiovascular
endocardiumThe innermost layer of the heart, consisting of endothelial cells. Cardiovascular
endocervicitisInflammation of the mucous lining of the uterine cervix.reproductive
endocrine systemThe system of glands that release their secretions (hormones) directly into the circulatory system. Endocrine
endocrinologyA subspecialty of internal medicine concerned with the metabolism, physiology, and disorders of the endocrine system. Endocrine
endodermThe inner of the three germ layers of an embryo. REproductive
endometri/oendometrium (mucous membrane lining the uterus)reproductive
endometriosisA painful, chronic disease where the tissue that normally grows inside the uterus grows outside it. May spread anywhere in the abdominal cavity.reproductive
endometriumThe mucous membrane comprising the inner layer of the uterine wall.Urinary
endomorphA body type that is relatively soft and round.Skeletal
endophyticPertaining to the tendency to grow inwardGeneral
endorphinA natural substance produced in the brain that binds to opioid receptors, dulling pain perception. General
endoscopeAn instrument for the visual examination of interior structures of the body.General
endotheliomaA tumor arising from the endothelial lining of blood vessels. General
endotheliumA layer of epithelium that lines the heart, blood vessels, lymph vessels and the serous cavities of the body. Cardiovascular
endovascular proceduresWithin a blood vessel.Cardiovascular
enemaA solution or compound that is introduced into the rectum with the purpose of cleansing the colon or for diagnostic procedures. Digestive
ENTear, nose, and throat
ent-within, insidegeneral
enter/osmall intestinesdigestive
enteritisInflammation of any segment of the small intestine.digestive
enterocolitisInflammation of the mucous membrane of both small and large intestines.Digestive
enterocytesColumnar cells of the small intestine responsible for the final digestion and absorption of nutrients, electrolytes and water.Digestive
enterostomyCreation of an artificial external opening or fistula in the intestines. Digestive
entropionThe eyelid is rolled inward toward the eye.eyes and ears
enuresisInvoluntary discharge of urine after completed development of urinary control.urinary
enzymeAny protein that acts as a catalyst,General
EOMextraocular muscles muscular
eoseosinophilcardiovascular
eosin/orose-coloredgeneral
eosinophilsA type of white blood cell. A granulocyte often increased with allergies and/or parasite infections.Cardiovascular
ependymaA thin membrane that lines the cerebral ventricles and the central canal of the spinal cord. Nervous
ephemeraPrinted matter of passing interest.General
epi-above, on, followingdirectional
epicardiumThe inner layer of the pericardium, covering the heart. Cardiovascular
epicondylitisTennis elbow. Occurs from partial or complete tears of the tendons of the forearm, or from overuse, a strain.muscular
epidemicAn rapid, widespread outbreak of a contagious disease.General
epidemiologyField of medicine concerned with the determination of causes, incidence, and characteristic behavior of disease outbreaks affecting human populations. General
epidermisThe superficial avascular layers of the skin,Integumentary
epididym/oepididymis (structure within the scrotum that stores sperm)reproductive
epididymisThe convoluted cordlike structure attached to the posterior of the testis.Reproductive
epididymitisInflammation of the epididymis.reproductive
epiduralOn or over the dura mater.Nervous
epidural anesthesiaA regional anesthesia that blocks pain.nervous
epiglott/oepiglottis (cartilage that prevents food from entering the trachea)digestive
epiglottisCartilage that prevents food from entering the trachea. Respiratory
epiglottitisInflammation of the epiglottis. Respiratory
epilationRemoval of a hair by its roots.Integumentary
epilepsyA general term for conditions with recurring seizures.nervous
epimysiumThe fibrous connective tissue surrounding a skeletal muscle.Muscular
epinephrineA hormone secreted by the medulla of the adrenal glands. Commonly called adrenaline.endocrine
epineuralOn a neural arch of a vertebra.Skeletal
epineuriumThe sheath of a peripheral nerve.Nervous
epiphoraOverflow of tears due to obstruction of the lacrimal duct.Eyes and Ears
episcleraThe loose connective tissue between the sclera and the conjunctiva.Eyes and Ears
episcleritisAn inflammation of the sclera, causing redness of the eye. Eyes and Ears
episi/ovulvareproductive
episiotomyAn incision made in the perineum to widens the opening of the vagina during childbirth.reproductive
epispadiasA birth defect due to malformation of the urethra.urinary
epistaxisNose bleed. Respiratory
epitheli/oepitheliumintegumentary
epithelial cellsCells that line the inner and outer surfaces of the body by forming cellular layers or masses.General
epitheliumlayers of cells that line hollow organs and glands. It is also those cells that make up the outer surface of the bodyintegumentary
epitopeAny site on an antigen that interact with specific antibodies. Lymphatic
EPOerythropoietincardiovascular
eponymThe name of a disease, procedure or body structure that is based upon the name of the discoverer.general
epulisA swelling on the gum.Digestive
µEqmicroequivalent
equi-equalgeneral
EREmergency Room,
ERBFeffective renal blood flowurinary
ERCPendoscopic retrograde cholangiopancreatography digestive
erectile dysfunctionThe consistent inability in the male to sustain an erection sufficient for sexual intercourse. Impotence.Reproductive
erethism/oirritationgeneral
erg-workGeneral
ergo-work, energymuscular
ergometryMeasuring the amount of work done by an organism.General
ergonomicsDesign work that reduces stress and eliminates injuries associated with the overuse of muscles, bad posture and repeated tasks.muscular
eructationTo belch.digestive
ERVexpiratory reserve volumerespiratory
erysipelasAn acute infection of the skin characterized by fever, headache, vomiting, and purplish raised lesions.Integumentary
erythemaRedness of the skin that results from capillary congestion.integumentary
erythr/oredcardiovascular
erythrasmaA chronic bacterial infection of major folds of the skin.Integumentary
erythroblastA nucleated immature red blood cell found in bone marrow.Cardiovascular
erythrocyt/ored blood cellcardiovascular
erythrocytesCells that contains hemoglobin and that can transport oxygen to body tissues. Commonly called red blood cells.Cardiovascular
erythrodermaAn intense and usually widespread reddening of the skin.integumentary
erythroidReddish color.Cardiovascular
erythromelalgiaA rare peripheral arterial disorder occurring in middle aged patients characterized by severe burning pain, reddening, hyperalgesia and sweating of the extremities.Cardiovascular
erythroplasiaDysplasia and erythema of the epitheliumGeneral
escharA dry scab formed on the skin following a burn or cauterization of the skinIntegumentary
eschar/oscabintegumentary
eso-inwarddirectional
esophag/oesophagusdigestive
esophageal achalasiaFailure of the lower esophageal sphincter to relax, resulting in functional obstruction of the esophagus, and dysphagia. Digestive
esophageal varicesAbnormally dilated veins of the esophagus. High risk of spontaneous bleeding. Associated with alcohol abuse.digestive
esophagitisInflammation of the esophagus.Digestive
esophagusThe muscular membranous passage between the pharynx and the stomach in the upper gastrointestinal tract. Digestive
esotropiaAn inward turning of one or both eyes.eyes and ears
ESRerythrocyte sedimentation rate
ESRDend-stage renal disease urinary
ESTelectroshock therapy nervous
esthes/onerve sensation, feelingnervous
-esthesiasensation, feelingnervous
estrogenHormones that are important for sexual and reproductive development in females.endocrine
ethnologyCultural anthropology. General
ethologyPertaining to the study of animal behavior. General
eti/ocausegeneral
ETUemergency trauma unit
eu-normal, goodgeneral
eukaryotaOne of the three domains of life (along with bacteria and archaea). Organisms whose cells are enclosed in membranes and possess a nucleus. Also called Eukarya.General
euphoriaA strong feeling of happiness, confidence, or well-being. General
eury-wide, broadgeneral
eustachian tubeA narrow canal extending from the middle ear to the pharynx. Digestive
euthanasiaThe practice of killing someone painlessly, to relieve suffering from an incurable illness. Mercy killing.General
ex-out, away fromdirectional
exanthemA widespread rash that is usually accompanied by symptoms that include fever, malaise and headache. integumentary
exanthemaEruption on the skin occurring as a symptom of a diseaseIntegumentary
exciseTo cut out a tumor, tissue or organ.General
excisionRemoval of tissue using a scalpel.general
excoriationAn abraded area where the skin is torn or worn offIntegumentary
exfoliationTo remove a layer of skin.Integumentary
exfoliative dermatitisA widespread scaling of the skin, often with itching (pruritus), skin redness (erythroderma), and hair loss.integumentary
exhalationBreathing out. Respiratory
exhumationRemoval of a dead body from the earth after burial. General
exo-outside, outwarddirectional
exocrine glandsGlands of external secretion that release its secretions to the body's cavities, organs, or surface, through a duct. General
exogenousOriginating from outsideGeneral
exophthalmosA bulging eyeball, associated with hyperthyroidism.endocrine
exoskeleton The exterior protective or supporting structure or shell of many animals.Skeletal
exostosesAbnormal bony outgrowth from the surface of a boneSkeletal
exotropia One or both of the eyes turn outward.eyes and ears
extexteriorDirectional
extensorAny muscle that extends a limb or other body part.Muscular
extirpationSurgical removal of a body part or tissueGeneral
extra-outside of, beyonddirectional
extractionSurgical removal of a body part.General
eyeThe organ of vision.Eyes And Ears
eyebrowThe bony ridge extending over the eye and the row of hair located on it. Eyes And Ears
eyelashesThe hairs which project from the edges of the eyelids. Eyes And Ears
eyelidsEach of the upper and lower folds of skin which cover the eye when closed. Eyes And Ears

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