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Medical Dictionary For: s

Word PartDefinitionCategory
s-t segmentThe segment on an EKG tracing that represents the interval between the end of ventricular depolarization and the beginning of ventricular repolarization.Cardiovascular
s.o.s.if necessary
S1first heart soundcardiovascular
S2second heart soundcardiovascular
S3third heart soundcardiovascular
S4fourth heart soundcardiovascular
SAsinoatrial cardiovascular
sacA bag-like structure.General
saccadesAn abrupt voluntary shift in ocular fixation from one point to another, as occurs in reading. Eyes And Ears
sacchar-sugargeneral
sacculeOne of the two membranous sacs within the vestibule of the inner ear. It contains fluid, responses to gravity and provides the brain with information about head position.Eyes And Ears
sacr/osacrum (large bone at base of spine)skeletal
sacroiliitisInflammation of the sacroiliac joint, marked by lower back pain, fever, uveitis, psoriasis and decreased range of motion. Skeletal
sacrumThe large, triangular bone at the dorsal part of the pelvis, between the two hip bones. The sacrum strengthens and stabilizes the pelvis. Skeletal
SADseasonal affective disorder nervous
sadismA condition in which there is pleasure from inflicting pain, discomfort or humiliation on another person.General
sagittalA plane that extends down the long axis of the body, parallel to the median plane.Skeletal
sagittal planeseparates the body's left and right sectionsdirectional
salicylismPoisoning by salicylic acid or its compounds.General
salivaThe clear, viscous fluid secreted by the salivary glands and mucous glands of the mouth. It serves to moisten the oral cavity, to initiate the digestion of starches, and to aid in the chewing and swallowing of food.Digestive
salivary ductsAny of the ducts which transport saliva. Digestive
salivary glandsGlands that secrete saliva in the mouth. There are three pairs of salivary glands: parotid gland; sublingual gland and submandibular gland. Digestive
salmonellaA genus of gram-negative, rod-shaped bacteria. It causes food poisoning, enteric fevers, gastroenteritis, and bacteremia.Digestive
salping/ofallopian tubereproductive
salpingitisInflammation of the fallopian or eustachian tube.Reproductive
salpingostomyFormation of an artificial opening in a fallopian tube. Reproductive
salvage therapyA therapeutic approach, involving chemotherapy, radiation therapy, or surgery, after initial regimens have failed to lead to improvement in a patient's condition. Salvage therapy is most often used for neoplastic diseases. General
sanatoriumA facility for the treatment of chronic disorders.General
sanguineousPertaining to blood.General
sanit/ahealthgeneral
sap/osoapgeneral
sapro-rottengeneral
sarc/oflesh, connective tissuelymphatic
sarcocystosisInfection of the striated muscle of mammals by parasites of the genus Sarcocystis. Often asymptomatic, but symptoms include vomiting, diarrhea, muscle weakness, and paralysis. Muscular
sarcoidA fleshy tumor.General
sarcoidosisAn disease that leads to inflammation, usually in the lungs, skin, or lymph nodes. Characterized by the formation of granulomas which contain giant cells.lymphatic
sarcomaA cancer of the bone, muscle, cartilage, fat, blood vessels or connective tissue.lymphatic
-sarcomacancer of connective tissuelymphatic
sarcopeniaA disease associated with aging resulting in loss of muscle mass and strength.muscular
SARSsevere acute respiratory syndrome respiratory
sartoriusThe thin, long, diagonal, strap-like anterior thigh muscle extending from the pelvis to the calf of the leg.Muscular
satiationA fulfillment of a need or desire followed by a state of relative insensitivity to that particular need or desire. General
saur/olizardgeneral
SBsmall bowel digestive
SBOsmall bowel obstructiondigestive
SBPsystolic blood pressure cardiovascular
SCsubcutaneous
scabiesItchy skin caused by a tiny burrowing mite. Symptoms worse at night.integumentary
scalpThe outer covering of the calvaria. It is composed of several layers: skin, subcutaneous connective tissue, the occipitofrontal muscle , loose connective tissue and the pericranium. General
scaph/oboat-shaped, scaphageneral
scaphoid boneThe bone which is located most lateral in the proximal row of carpal bones. Skeletal
scapul/oscapula (shoulder blade)skeletal
scapulaThe flat triangular bone in the back of the shoulder. Also called the shoulder blade.Skeletal
scarA permanent mark remaining after a wound heals. Integumentary
scarlet feverAn acute contagious bacterial disease of childhood characterized by tonsillitis and pharyngitis as well as fever, chills, nausea, headache, abdominal pain, malaise and rash.General
scat-dunggeneral
-schisiscleft, splitcardiovascular
schisto-split, cleftgeneral
schiz-divisionnervous
schizophreniaA chronic, severe mental illness that interferes with the ability to think, manage emotions, make decisions and relate to others.nervous
sciatic nerveA nerve which originates in the lumbar and sacral spinal cord and supplies motor and sensory innervation to the lower extremity. The sciatic nerve is the largest nerve in the body.Nervous
sciaticaPain radiating along the sciatic nerve from the lower back down the leg.nervous
scint/isparkgeneral
scirrh/ohard, hard tumorlymphatic
scler-hardgeneral
scler/owhite of eye, hardeyes and ears
scleraThe white, opaque, fibrous, outer envelope of the eyeball, covering it entirely except the cornea. Eyes And Ears
scleritisA severe, vision-threatening inflammation of the white part of the eye.eyes and ears
sclerodermaAn autoimmune, chronic disease that affects the body by hardening connective tissue.integumentary
sclerosisA pathological process consisting of hardening or fibrosis of an anatomical structure, often a vessel or a nerve. General
-sclerosisabnormal hardeninggeneral
scoli/ocurved, crookedskeletal
scoliosisA sideways curvature of the spine that occurs most often during the growth spurt just before puberty. skeletal
-scopeinstrument used to viewgeneral
-scopyprocess of viewinggeneral
scot/odarknesseyes and ears
scotomaAn area of diminished vision within the visual field.Eyes And Ears
scotopicPertaining to the adjustment of the eye to low illumination.Eyes And Ears
scrofulaTuberculosis affecting the lymph nodes, particularly the neck.Lymphatic
scrot/oscrotumreproductive
scrotumA pouch of skin containing the testicles and spermatic cords. Reproductive
scurvyAn acquired blood vessel disorder caused by severe deficiency of vitamin C, characterized by spongy, bleeding gums, bleeding under the skin, and extreme weakness.Digestive
SDATstandard deviation
seb/osebum, oil, fattyintegumentary
sebaceous glandsSmall, sacculated organs found within the dermis. Each gland has a single duct that opens into a hair follicle or onto the general surface of the skin. These glands secrete sebum, an oily lubricating substance. Integumentary
seborrheaA common skin problem that causes a red, itchy rash and white scales. On the scalp, it is called dandruff.integumentary
sebumThe oily substance secreted by sebaceous glands. It is composed of keratin, fat, and cellular debris. Integumentary
sect-dissect, cutGeneral
sedationThe reduction of anxiety, stress or excitement by administration of a sedative drug.General
sedativeA drug that calms and relieves anxiety.General
sedentary lifestyleUsual level of physical activity that is less than 30 minutes of moderate-intensity activity on most days of the week. General
seizureA sudden surge of the brain’s electrical activity affecting movement and awareness for a short time.nervous
seizuresA sudden attack, spasm, or convulsion. General
semanticsStudy of the meanings of words (or symbols) and the rules of their use.General
semenThe thick, yellowish-white, viscid fluid secretion of male reproductive organs discharged upon ejaculation. It contains spermatozoa and their nutrient plasma and secretions from the prostate and bulbourethral glands.Reproductive
semi-halfgeneral
semicircular canalsThree long canals (anterior, posterior, and lateral) of the bony labyrinth. They are set at right angles to each other and are concerned with balance.Eyes And Ears
semih.half an hour
semilunar valveEither the aortic valve or the pulmonary valve, each consisting of crescent-shaped cusps.Cardiovascular
semin/isemenreproductive
seminomaA malignant neoplasm of the testis.Reproductive
senescenceThe process of growing old.General
sensationA perception produced by afferent nerve impulses conveyed to the sensorium. Nervous
sensitivityThe probability that a person having a disease will be correctly identified by a clinical test.General
sensor/isensorygeneral
sensorineural hearing lossLoss of hearing resulting from problems in the inner ear. A common hearing impairment.eyes and ears
sepsisA serious medical condition caused by an overwhelming immune response to infection that triggers widespread inflammation. When sepsis is accompanied by hypotension despite adequate fluid infusion, it is called septic shock.Cardiovascular
-sepsisdecay caused bylymphatic
sept/oseptum, sevengeneral
septal defectA hole in the septum of the heart, usually congenital.Cardiovascular
septi-sevengeneral
septicemiaA serious bacterial bloodstream infection. It’s also known as bacteremia, or blood poisoning. Cardiovascular
sequelaAny disorder that results from a preceding disease or accident.General
ser/oblood serumcardiovascular
seromaTumor-like sterile accumulation of serum in a tissue, organ, or cavity. It most commonly occurs following mastectomy. General
seropusPus diluted with serum.General
serositisInflammation of a serous membrane. General
serotoninA compound widely distributed in the tissues that mediates important physiological functions including neurotransmission, gastrointestinal motility, hemostasis, and cardiovascular integrity.General
serous membraneA thin layer of tissue that covers a surface, cavity or divides a space. It consists of a single layer of squamous epithelial cells (mesothelium) resting on a thin layer of connective tissue, and covered with secreted clear fluid from blood and lymph vessels. Major serous membranes in the body include pericardium; peritoneum; and pleura. General
serratiaA genus of gram-negative, rod-shaped bacteria that occurs in soil, water and plant surfaces or as an opportunistic human pathogen. General
serumBlood plasma after the removal of clotting proteins.Cardiovascular
sesamoidDenoting a small nodular bone embedded in a tendon or joint capsule and that slides over another bony surface. The patella is a sesamoid bone. Skeletal
sesqui-one and one-halfgeneral
sexThe totality of characteristics of reproductive structure, functions, phenotype, and genotype, differentiating the male from the female organism. Reproductive
sex-sixgeneral
sexualityThe sexual functions, activities, attitudes, and orientations of an individual. Sexuality, male or female, becomes evident at puberty under the influence of gonadal steroids (testosterone or estradiol) and social effects. Reproductive
SGAsmall for gestational age reproductive
shaken baby syndromeBrain injuries resulted from vigorous shaking of an infant or young child held by the chest, shoulders, or extremities causing extreme cranial acceleration. It is characterized by the intracranial and intraocular hemorrhages with no evident external trauma. Serious cases may result in death. Reproductive
sheathA tubular casing that envelops structures such as arteries, nerves, tendons and muscles.General
shin splintInflammation of the muscles, tendons, and bone tissue around the tibia.muscular
shiveringInvoluntary contraction or twitching of the muscles due to cold or fear.Muscular
shockAn emergency pathological condition manifested by failure to perfuse or oxygenate vital organs and tissues.General
shoulderThe junction of the clavicle, scapula, and humerus where the arm connects to the trunk. Skeletal
shoulder dislocationDisplacement of the humerus from the scapula. Skeletal
shuntA passage connecting two anatomical sites or channels.General
SIinternational system of units
SIADHsyndrome of inappropriate diuretic hormone endocrine
sial/osalivadigestive
sialaden/osalivary glanddigestive
sialadenitisInflammation of a salivary gland. Digestive
sialomucinsA subcategory of mucins that contain sialic acid. Respiratory
sialorrheaExcessive salivary flow. Digestive
sibilantA high pitched hissing or whistling sound heard while auscultating.General
sicc-drygeneral
sickle cell anemiaAn inherited form of anemia where red blood cells become rigid, sticky and shaped like sickles. These irregularly shaped cells can get stuck in small blood vessels, which can slow or block blood flow to parts of the body.Cardiovascular
SICUsurgical intensive care unit
sider/oiron cardiovascular
siderosisA form of pneumoconiosis resulting from inhalation of iron in mining dust or welding fumes. Respiratory
SIDSsudden infant death syndrome respiratory
Sigwrite on label
sigmoidThe distal part of the colon from the level of the iliac crest to the rectum.Digestive
sigmold/osigmoid colondigestive
signObjective evidence of a disease.general
sign languageA system of hand gestures used for communication by the deaf or by people speaking different languages. General
signs and symptomsClinical manifestations that can be either objective when observed by a physician, or subjective when perceived by the patient. General
silic/osilica, quartzgeneral
silicosisA form of pneumoconiosis resulting from prolonged inhalation of silica dust.Respiratory
simplexvirusA genus of the family herpesviridae, consisting of herpes simplex-like viruses. General
simvastatinA statin used to treat high blood cholesterol levels.Cardiovascular
singultusHiccups.muscular
sinistr/oleftdirectional
sinoatrial blockThe electrical impulse from the sinoatrial node is inhibited or completely blocked before it reaches the atrium.Cardiovascular
sinoatrial nodeThe small mass of modified cardiac muscle fibers located in the upper part of the right atrium. Contraction impulses are generated at the SA node and spread over the atrium, then transmitted by the Bundle of HIS to the ventricles. Cardiovascular
sinus rhythmA normal heart rhythm as indicated on an EKG tracing.Cardiovascular
sinus/osinusrespiratory
sinusitisInflammation of the sinuses. Respiratory
-sisconditiongeneral
sito-bread, fooddigestive
skeleto-skeletongeneral
skeletonThe rigid framework of connected bones that gives form to the body, protects and supports its soft organs and tissues and provides attachments for muscles. Skeletal
skinThe tough, supple, outer covering of the body that protects it from the environment. It is the largest organ of the body and is composed of the dermis and the epidermis. Integumentary
skullThe skeleton of the head including the facial bones and the bones enclosing the brain. Skeletal
SLEsystemic lupus erythematosus Integumentary
sleepPhysiologic state of rest, relative unconsciousness and inaction of voluntary muscles.Nervous
sleep apneaSleep disorder characterized by multiple starts and stops of breathing, interfering with normal sleeping patterns. Measurable decrease in blood oxygen levels.Respiratory
slingA bandage that supports an injured limb.Skeletal
sloughNecrotic tissue separated from living tissue.General
smallpoxAn acute, highly contagious, often fatal infectious viral disease characterized by fever and skin eruptions. It has been eradicated by vaccination programs worldwide.General
smearA tissue specimen smeared on a microscopic slide.General
smellThe ability to detect scents or odors, such as the function of olfactory receptor neurons. Nervous
Sntin general
sneezingThe sudden, forceful, involuntary expulsion of air from the nasal cavities and mouth due to irritation to the mucous membranes of the upper respiratory tract. Respiratory
SNFskilled nursing facility
snoringNoisy breathing during sleep, due to vibration of the soft palate and other soft tissue in the upper airway. Respiratory
snow blindnessA painful eye condition caused by exposure of insufficiently protected eyes to ultraviolet (UV) rays. Also called photokeratitis.Eyes And Ears
SOAPsubjective, objective, assessment, plan
SOBshortness of breath respiratory
socio-social, societygeneral
solsolution
soleusA flat, broad muscle in the calf of the leg.Muscular
solutionA homogeneous mixture formed by the mixing of a solid, liquid, or gaseous substance with a liquid (the solvent) in which the substances are completely dispersed.General
solventA liquid that dissolves other substances (solutes), generally solids.General
somaThe body as distinguished from the mind or germ cells.General
somat/obodygeneral
somaticPertaining to the body.General
somatotrophsAnterior pituitary cells which produce growth hormone. Endocrine
somatotypesCategories of body build determined on the basis of certain physical characteristics. The three basic body types are ectomorph (thin physique), endomorph (rounded physique), and mesomorph (athletic physique). General
-somebodygeneral
somn/osleepnervous
somnambulismA parasomnia characterized by a partial arousal that occurs during stage IV of non-REM sleep. Also called sleep-walking.General
son/osoundeyes and ears
souffleA soft blowing sound heard with a stethoscope.Cardiovascular
-spadiato tear, cutgeneral
span/oscarcegeneral
spasmAn involuntary contraction of a muscle or group of muscles.Muscular
-spasmsudden, involuntary muscle contractiongeneral
spasmo-spasmmuscular
spasmodic torticollisA very painful condition in which neck muscles contract involuntarily causing the head to twist, bend or rotate to one side.muscular
specific gravityThe ratio of the density of a material to water at 4 degrees C.General
specificityThe probability that a person who does not have a disease will be correctly identified by a clinical test.General
spectr-imagegeneral
spectrometryMeasurement of the wavelengths of electromagnetic emissions.General
speechUse of vocal sounds to communicate.General
spermThe male gamete or sex cell that contains the genetic information to be transmitted by the male. Also called spermatozoon.Reproductive
sperm/osperm cellsreproductive
sperma-sperm, seedreproductive
spermatidsImmature sperm cells developed in the testicle.Reproductive
spermatozoaMature male germ cells derived from spermatids.Reproductive
SPFskin protection factor integumentary
sphen/owedge, wedge-shapedgeneral
sphenoid boneAn irregular unpaired bone situated at the skull base and wedged between the frontal, temporal, and occipital bones.Skeletal
sphenoid/osphenoid (compound bone at base of skull)skeletal
spher/osphere, roundgeneral
spherocytesSmall, abnormal spherical red blood cells with more than the normal amount of hemoglobin. Cardiovascular
spherocytosisA blood disorder characterized by the presence of small, sphere like red blood cells.Cardiovascular
sphincterA ring-link muscle that constrictions a natural body passage or orifice and which relaxes as needed. Present in the rectum and urinary tract.muscular
sphygmo-pulsecardiovascular
sphygmomanometerDevice for measuring arterial blood pressure. Includes an inflatable cuff, inflating bulb and a gauge showing the blood pressure. Cardiovascular
spicaA figure-eight bandage.General
spin/ospineskeletal
spina bifidaA spinal birth defect.skeletal
spinal cordThe section of the central nervous system enclosed in the vertebral column.Nervous
spinal nervesThe 31 paired peripheral nerves formed by the union of the dorsal and ventral spinal roots from each spinal cord segment. The spinal nerve plexuses and the spinal roots are also included. Nervous
spinal punctureTapping fluid from the subarachnoid space in the lumbar region, usually between the third and fourth lumbar vertebrae. Nervous
spinal stenosisNarrowing of the spinal canal. Nervous
spineThe spinal or vertebral column. Skeletal
spir/oto breathrespiratory
spirometerDevice that measures inhaled or exhaled air volume.Respiratory
splanchn/oviscerageneral
splanchnicPertaining to the viscera.General
spleenAn encapsulated lymphatic organ through which venous blood filters. lymphatic
splen/ospleenlymphatic
splenectomySurgical procedure involving either partial or entire removal of the spleen. Lymphatic
splenic arteryThe largest branch of the celiac trunk with distribution to the spleen, pancreas, stomach and greater omentum. Cardiovascular
splenitisInflammation of the spleen.Lymphatic
splenomegalyEnlargement of the spleen.lymphatic
splintAn appliance used to prevent movement of a joint or to fixate displaced or movable parts.General
spondyl/overtebra, backboneskeletal
spondylitisInflammation of the synovial joints of the backbone.Skeletal
spondylolisthesisForward displacement of a superior vertebral body over the vertebral body below. Skeletal
spondylolysisThe degeneration of a vertebra.skeletal
spondylosisA degenerative spinal disease that can involve any part of the vertebra, the intervertebral disk, and the surrounding soft tissue. Skeletal
spongi/osponge-likegeneral
spor/ospore, seedgeneral
sporesThe reproductive elements of lower organisms such as bacteria and fungi. General
sprainAn injury caused by tearing of the fibers of a ligament. muscular
sptspirit
sputumMaterial coughed up from the lungs.Respiratory
sqsquamousintegumentary
squam/oscalyintegumentary
squamous cell carcinomaMost squamous cell cancers occur on skin that is regularly exposed to sunlight or other ultraviolet radiation. It is the second most common type of cancer in the United States.integumentary
ssa half
SSSsick sinus syndrome cardiovascular
-stabilestable, fixedgeneral
-stalsiscontractiongeneral
staped/ostapes (a middle ear bone)eyes and ears
stapedectomySurgical removal of the stapes.eyes and ears
stapesOne of the three ossicles of the middle ear. It transmits sound vibrations from the incus to the internal ear.Eyes And Ears
staphylo-bunch of grapesgeneral
staphylococciGram-positive bacteria. Natural populations of Staphylococcus are found on the skin and mucous membranes.lymphatic
staphylococcusAny of various spherical gram-positive parasitic bacteria, causing skin and other infections.General
stasisA cessation or diminution of flow of blood or other fluids.Cardiovascular
-stasismaintenance of level, prevent increasegeneral
-statagent or device for keeping something from changinggeneral
STATimmediately general
STDsexually transmitted disease reproductive
steat/ofatgeneral
steatomaA cyst or tumor of the sebaceous gland.Integumentary
stem cellsAn unspecialized cell that can give rise to one or more different types of specialized cells, such as blood cells and nerve cells. Stem cells are present in embryos and in various tissues of adult organismsGeneral
stenosisThe abnormal narrowing of a passage or opening.General
-stenosisabnormal narrowingcardiovascular
stentsA small mesh tube used to treat narrow or weak arteries.Cardiovascular
sterc-fecesGeneral
stere/othree dimensionalgeneral
stereognosisPerception of shape and form of objects by the sense of touch.General
sterileUnable to produce offspring.Reproductive
sterilizationThe destroying of microorganisms by heat, chemicals, irradiation or other means.General
stern/osternum (breastbone)skeletal
sternoclavicular jointA double gliding joint formed by the clavicle, superior and lateral parts of the manubrium sternum at the clavicular notch and the cartilage of the first rib. Skeletal
sternumA long, narrow, and flat bone commonly known as breastbone occurring in the midsection of the anterior thoracic segment or chest region, which stabilizes the rib cage and serves as the point of origin for several muscles that move the arms, head and neck. Skeletal
steroidsA hormone produced by the body. Also a drug used for treating swelling or to (illegally) improve athletic performance.endocrine
steth/ochestrespiratory
stethoscopeInstrument for listening to body sounds (auscultation).General
STHsomatotropic hormonecardiovascular
sthen/ostrengthmuscular
stich/orowsgeneral
stom/omouthdigestive
stoma-mouthdigestive
stomachA saclike digestive organ situated in the left upper quadrant of the abdomen between the termination of the esophagus and the beginning of the duodenum. Digestive
stomach ulcerUlceration of the gastric mucosa due to contact with gastric juice.Digestive
stomatitisInflammation of the soft tissues of the mouth. Canker sores are an example.digestive
-stomynew openinggeneral
stoolFeces discharged from the anus.Digestive
strabismusA condition that causes crossed eyes.eyes and ears
strainOverstretching or overexertion of a part of the musculature.Muscular
strat/ilayergeneral
strept/otwistedgeneral
stressThe unfavorable effect of environmental factors on the physiological functions.Nervous
stress testA test to evaluate heart function by monitoring heart rate, breathing, blood pressure and EKG while the patient exercises with a treadmill or exercise bike.Cardiovascular
stridorA very loud, wheezing breath sound heard when the trachea or larynx is obstructed.Respiratory
strokeA group of pathological conditions characterized by sudden, non-convulsive loss of neurological function due to brain ischemia or intracranial hemorrhages. It is both common and deadly.Cardiovascular
stroke volumeThe amount of blood pumped out of one ventricle of the heart in one beat.Cardiovascular
-stromaconnective or supportive tissue of an organmuscular
stromalRelating to the foundation-supporting tissues of an organ. General
stuporA state of diminished responsiveness to stimuli. The person is still conscious and can make voluntary movements.General
stutteringA disturbance in the normal fluency characterized by frequent repetitions, pauses or prolongations of syllables. General
styeAcute bacterial inflammation of a gland at the base of an eyelash.Eyes And Ears
sub-under, belowdirectional
subclavianBelow the clavicle.General
subcutaneousBeneath the skin.Integumentary
subduralBelow the dura mater.General
subdural effusionLeakage and accumulation of cerebrospinal fluid in the subdural space which may be associated with an infection, craniocerebral trauma, brain neoplasms, intracranial hypotension and other conditions. General
sublimationA defense mechanism through which unacceptable impulses are diverted into socially acceptable channels.General
sublingualBelow the tongue.General
sublingual glandA salivary gland located under the tongue in the floor of the oral cavity.digestive
subretinal fluidAn exudate between the retina and choroid from various sources including the vitreous cavity, subarachnoid space or abnormal vessels. General
subtalar jointFormed by the articulation of the talus with the calcaneus. Skeletal
sucroseCane or beet sugar.Digestive
suctionThe removal of secretions, gas or fluid from hollow or tubular organs or cavities by means of a tube and a device that acts on negative pressure. General
sud/osweatgeneral
sudden cardiac arrestA sudden and unexpected cessation of cardiac function due to electrical malfunction. Reversible if immediately treated.Cardiovascular
sudden cardiac deathSudden, unexpected death caused by loss of cardiac function. Cardiovascular
sudden infant death syndromeThe abrupt and unexplained death of an apparently healthy infant under one year of age. Positioning infants for sleep on their backs or sides has reduced SIDS incidence.Respiratory
sunburnAn injury to the skin due to excessive sun exposure, causing erythema, tenderness, and sometimes blistering.Integumentary
sunstrokeHeat stroke caused by exposure to the sun. It is characterized by dangerously high body temperature, red skin, delusions, convulsions or coma. It can be a life-threatening emergency and is most common in infants and the elderly. General
sup.superior directional
super-above, beyonddirectional
superegoThe component of the personality associated with ethics, standards, and self-criticism.Nervous
superficialnear the surfacedirectional
superiorabovedirectional
supf.superficial Integumentary
supinationThe condition of being supine. Alternatively, the act of turning the hand so that the palm is up.Directional
supinelying face updirectional
suppositoryMedicated dosage that is designed to be inserted into the rectal, vaginal, or urethral orifice of the body for absorption. General
suppurationA pathologic process consisting in the formation of pus. General
supra-above, upwarddirectional
supraglottitisInflammation of the of the laryngeal tissue above the glottis, particularly the epiglottis.Digestive
sural nerveA branch of the tibial nerve which supplies sensory innervation to parts of the lower leg and foot. Nervous
surface tensionThe force acting on the surface of a liquid, tending to minimize the area of the surface.General
susceptibilityVulnerable to a disease.General
suspsuspension
suspensionA preparation of an undissolved substance dispersed in a liquid.General
suturesA stitch or stitches used to close a wound.General
SVTsupraventricular tachycardiacardiovascular
Sxsymptoms
sycosisInflammation of hair follicles.Integumentary
symbiosisA Relationship between different species where both of the organisms in question benefit from the presence of the other. General
symptomSubjective evidence of disease. For example, a patient's complaints.general
syn-togethergeneral
synaps/opoint of contactnervous
synapseThe junctional area between two connected nerves or between a nerve and the effector organ.Nervous
syncopeFainting. Loss of consciousness due to diminished blood flow to the brain.Cardiovascular
syndactylyA congenital anomaly of the hand or foot, marked by the webbing between adjacent fingers or toes. General
syndesm/oligamentmuscular
syndromeA characteristic set of signs and symptoms of a particular disorder. General
synovectomyRemoval of part or all of the synovial membrane of a jointskeletal
synovi/osynovial membrane, synovial jointskeletal
synovitisInflammation of a synovial membrane.General
syphil/osyphilisgeneral
syphilisA sexually transmitted disease. A bacterial infection.reproductive
syrsyrup
syring/otube, pipe, fistulanervous
syringeAn instrument used for injecting or withdrawing fluids. General
systemicAffecting the body as a whole.General
systemic circulationThe circulation of the blood to all parts of the body except the lungs. Cardiovascular
systemic lupus erythematosusAn autoimmune disease in which the immune system mistakenly attacks healthy tissue.integumentary
systol/ocontractioncardiovascular
systolePeriod of heart contraction when blood is surging from the heart into the systemic circulatory system and the lungs.Cardiovascular
systolic blood pressureArterial blood pressure during heart contraction. In blood pressure readings, it is the first number.Cardiovascular
systolic murmursHeart murmurs which occur during systole. They are heard between the first and the second heart sounds.Cardiovascular
Szseizurenervous

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