| somatotropin | (noun) a hormone produced by the anterior pituitary gland; promotes growth in humans | Synonyms: growth hormone, human growth hormone, somatotrophic hormone, somatotrophin, somatotropic hormone, STH |
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| soupfin | (noun) Pacific shark valued for its fins (used by Chinese in soup) and liver (rich in vitamin A) | Synonyms: Galeorhinus zyopterus, soup-fin, soupfin shark |
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| spavin | (noun) a swelling of the hock joint of a horse; resulting in lameness | - |
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| spectinomycin | (noun) an antibiotic used to treat gonorrhea | - |
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| spillikin | (noun) a thin strip of wood used in playing the game of jackstraws | Synonyms: jackstraw |
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| spin | (noun) the act of rotating rapidly | Synonyms: twirl, twist, twisting, whirl |
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| (noun) a short drive in a car | - |
| (noun) rapid descent of an aircraft in a steep spiral | Synonyms: tailspin |
| (noun) a distinctive interpretation (especially as used by politicians to sway public opinion) | - |
| (noun) a swift whirling motion (usually of a missile) | - |
| (verb) prolong or extend | Synonyms: spin out |
| (verb) twist and turn so as to give an intended interpretation | - |
| (verb) work natural fibers into a thread | - |
| (verb) form a web by making a thread | - |
| (verb) make up a story | - |
| (verb) stream in jets, of liquids | - |
| (verb) revolve quickly and repeatedly around one's own axis | Synonyms: gyrate, reel, spin around, whirl |
| (verb) cause to spin | Synonyms: birl, twirl, whirl |
| sprain | (noun) a painful injury to a joint caused by a sudden wrenching of its ligaments | - |
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| (verb) twist suddenly so as to sprain | Synonyms: rick, turn, twist, wrench, wrick |
| stain | (noun) an act that brings discredit to the person who does it | Synonyms: blot, smear, smirch, spot |
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| (noun) a soiled or discolored appearance | Synonyms: discoloration, discolouration |
| (noun) a symbol of disgrace or infamy | Synonyms: brand, mark, stigma |
| (noun) anything regarded as making something unclean | Synonyms: dirt, filth, grease, grime, grunge, soil |
| (noun) (microscopy) a dye or other coloring material that is used in microscopy to make structures visible | - |
| (verb) produce or leave stains | - |
| (verb) color with a liquid dye or tint | - |
| (verb) color for microscopic study | Synonyms: dye |
| (verb) make dirty or spotty, as by exposure to air; also used metaphorically | Synonyms: defile, maculate, sully, tarnish |
| statin | (noun) a medicine that lowers blood cholesterol levels by inhibiting HMG-CoA reductase | Synonyms: lipid-lowering medication, lipid-lowering medicine, statin drug |
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| stearin | (noun) an ester of glycerol and stearic acid | - |
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| stein | (noun) a mug intended for serving beer | Synonyms: beer mug |
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| stickpin | (noun) a decorative pin that is worn in a necktie | - |
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| strain | (noun) an effortful attempt to attain a goal | Synonyms: nisus, pains, striving |
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| (noun) the act of singing | Synonyms: song |
| (noun) an intense or violent exertion | Synonyms: straining |
| (noun) the general meaning or substance of an utterance | Synonyms: tenor |
| (noun) a succession of notes forming a distinctive sequence | Synonyms: air, line, melodic line, melodic phrase, melody, tune |
| (noun) a special variety of domesticated animals within a species | Synonyms: breed, stock |
| (noun) (biology) a group of organisms within a species that differ in trivial ways from similar groups | Synonyms: form, var., variant |
| (noun) (physics) deformation of a physical body under the action of applied forces | - |
| (noun) injury to a muscle (often caused by overuse); results in swelling and pain | - |
| (noun) (psychology) nervousness resulting from mental stress | Synonyms: mental strain, nervous strain |
| (noun) difficulty that causes worry or emotional tension | Synonyms: stress |
| (verb) cause to be tense and uneasy or nervous or anxious | Synonyms: tense, tense up |
| (verb) alter the shape of (something) by stress | Synonyms: deform, distort |
| (verb) to exert much effort or energy | Synonyms: reach, strive |
| (verb) use to the utmost; exert vigorously or to full capacity | Synonyms: extend |
| (verb) remove by passing through a filter | Synonyms: filter, filter out, filtrate, separate out |
| (verb) separate by passing through a sieve or other straining device to separate out coarser elements | Synonyms: sieve, sift |
| (verb) become stretched or tense or taut | Synonyms: tense |
| (verb) rub through a strainer or process in an electric blender | Synonyms: puree |
| (verb) test the limits of | Synonyms: stress, try |
| streptolysin | (noun) any of several hemolysins derived from strains of streptococcus | - |
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| streptomycin | (noun) an antibiotic produced by the actinomycete Streptomyces griseus and used to treat tuberculosis | - |
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| streptothricin | (noun) a basic antibiotic derived from a soil actinomycete | - |
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| strophanthin | (noun) a bitter and very toxic glycoside derived from plants of the genus Strophanthus; in moderate doses it is a cardiac stimulant but in larger doses it is a powerful poison; used in Africa as an arrow poison | - |
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| subjoin | (verb) add to the end | - |
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| subtilin | (noun) a polypeptide antibiotic (similar to bacitracin) obtained from a soil bacterium | - |
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| supervillain | (noun) a villain with superpowers | - |
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| sustain | (verb) undergo (as of injuries and illnesses) | Synonyms: get, have, suffer |
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| (verb) establish or strengthen as with new evidence or facts | Synonyms: affirm, confirm, corroborate, substantiate, support |
| (verb) admit as valid | - |
| (verb) supply with necessities and support | Synonyms: keep, maintain |
| (verb) provide with nourishment | Synonyms: nourish, nurture |
| (verb) be the physical support of; carry the weight of | Synonyms: hold, hold up, support |
| (verb) lengthen or extend in duration or space | Synonyms: keep up, prolong |
| suzerain | (noun) a state exercising a degree of dominion over a dependent state especially in its foreign affairs | - |
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| swain | (noun) a man who is the lover of a man or woman | Synonyms: beau, boyfriend, fellow |
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| tailfin | (noun) a stabilizer that is part of the vertical tail structure of an airplane | Synonyms: tail fin, vertical fin, vertical stabiliser, vertical stabilizer |
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| (noun) one of a pair of decorations projecting above the rear fenders of an automobile | Synonyms: fin, tail fin |
| tailspin | (noun) rapid descent of an aircraft in a steep spiral | Synonyms: spin |
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| (noun) loss of emotional control often resulting in emotional collapse | - |
| takin | (noun) large heavily built goat antelope of eastern Himalayan area | Synonyms: Budorcas taxicolor, gnu goat |
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| talapoin | (noun) smallest guenon monkey; of swampy central and west African forests | Synonyms: Cercopithecus talapoin |
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| tamarin | (noun) small South American marmoset with silky fur and long nonprehensile tail | Synonyms: leoncita, lion marmoset, lion monkey |
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| tannin | (noun) any of various complex phenolic substances of plant origin; used in tanning and in medicine | Synonyms: tannic acid |
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| tarpaulin | (noun) waterproofed canvas | Synonyms: tarp |
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| tefillin | (noun) (Judaism) either of two small leather cases containing texts from the Hebrew Scriptures (known collectively as tefillin); traditionally worn (on the forehead and the left arm) by Jewish men during morning prayer | Synonyms: phylactery |
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| tenderloin | (noun) the tender meat of the loin muscle on each side of the vertebral column | Synonyms: undercut |
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| (noun) a city district known for its vice and high crime rate | Synonyms: combat zone |
| tenpin | (noun) one of the bottle-shaped pins used in bowling | - |
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| terazosin | (noun) antihypertensive drug (trade name Hytrin) used to treat high blood pressure | Synonyms: Hytrin |
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| terrain | (noun) a piece of ground having specific characteristics or military potential | - |
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| terrapin | (noun) any of various edible North American web-footed turtles living in fresh or brackish water | - |
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| terreplein | (noun) level space where heavy guns can be mounted behind the parapet at the top of a rampart | - |
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| tetrodotoxin | (noun) a powerful neurotoxin found in the ovaries of pufferfish | - |
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| theelin | (noun) a naturally occurring weak estrogenic hormone secreted by the mammalian ovary; synthesized (trade name Estronol) and used to treat estrogen deficiency | Synonyms: estrone, Estronol, oestrone |
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| therein | (adverb) (formal) in or into that thing or place | Synonyms: in that, in this |
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| theremin | (noun) an electronic musical instrument; melodies can be played by moving the right hand between two rods that serve as antennas to control pitch; the left hand controls phrasing | - |
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| thiamin | (noun) a B vitamin that prevents beriberi; maintains appetite and growth | Synonyms: aneurin, antiberiberi factor, thiamine, vitamin B1 |
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| thin | (adjective) of relatively small extent from one surface to the opposite or in cross section | - |
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| (adjective) relatively thin in consistency or low in density; not viscous | - |
| (adjective) lacking excess flesh | Synonyms: lean |
| (adjective) (of sound) lacking resonance or volume | - |
| (adjective) not dense | Synonyms: sparse |
| (adjective) very narrow | Synonyms: slender |
| (adjective) lacking spirit or sincere effort | - |
| (adjective) lacking substance or significance | Synonyms: flimsy, fragile, slight, tenuous |
| (adverb) without viscosity | Synonyms: thinly |
| (verb) take off weight | Synonyms: melt off, reduce, slenderize, slim, slim down |
| (verb) lose thickness; become thin or thinner | - |
| (verb) make thin or thinner | - |
| (verb) lessen the strength or flavor of a solution or mixture | Synonyms: cut, dilute, reduce, thin out |
| tholepin | (noun) a holder attached to the gunwale of a boat that holds the oar in place and acts as a fulcrum for rowing | Synonyms: oarlock, peg, pin, rowlock, thole |
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| threadfin | (noun) mullet-like tropical marine fishes having pectoral fins with long threadlike rays | - |
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| thrombin | (noun) an enzyme that acts on fibrinogen in blood causing it to clot | - |
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| thromboplastin | (noun) an enzyme liberated from blood platelets that converts prothrombin into thrombin as blood starts to clot | Synonyms: factor III, thrombokinase |
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| thymosin | (noun) hormone secreted by the thymus; stimulates immunological activity of lymphoid tissue | - |
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| thyrocalcitonin | (noun) thyroid hormone that tends to lower the level of calcium in the blood plasma and inhibit resorption of bone | Synonyms: calcitonin |
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| thyroglobulin | (noun) an iodine containing protein that is obtained from the thyroid gland and exhibits the general properties of the globulins | - |
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| thyroprotein | (noun) a preparation made from iodinated protein and having an action similar to thyroxine | - |
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| thyrotrophin | (noun) anterior pituitary hormone that stimulates the function of the thyroid gland | Synonyms: thyroid-stimulating hormone, thyrotrophic hormone, thyrotropic hormone, thyrotropin, TSH |
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| thyrotropin | (noun) anterior pituitary hormone that stimulates the function of the thyroid gland | Synonyms: thyroid-stimulating hormone, thyrotrophic hormone, thyrotrophin, thyrotropic hormone, TSH |
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| thyroxin | (noun) hormone produced by the thyroid glands to regulate metabolism by controlling the rate of oxidation in cells | Synonyms: T, tetraiodothyronine, thyroxine |
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| tiepin | (noun) a pin used to hold the tie in place | Synonyms: scarfpin, tie tack |
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| tiffin | (noun) a midday meal | Synonyms: dejeuner, lunch, luncheon |
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| tin | (noun) airtight sealed metal container for food or drink or paint etc. | Synonyms: can, tin can |
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| (noun) metal container for storing dry foods such as tea or flour | Synonyms: canister, cannister |
| (noun) a vessel (box, can, pan, etc.) made of tinplate and used mainly in baking | - |
| (noun) a silvery malleable metallic element that resists corrosion; used in many alloys and to coat other metals to prevent corrosion; obtained chiefly from cassiterite where it occurs as tin oxide | Synonyms: atomic number 50, Sn |
| (verb) preserve in a can or tin | Synonyms: can, put up |
| (verb) prepare (a metal) for soldering or brazing by applying a thin layer of solder to the surface | - |
| (verb) plate with tin | - |
| tiyin | (noun) 100 tiyin equal 1 tenge in Kazakhstan | - |
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| (noun) 100 tiyin equal 1 som in Uzbekistan | - |
| tobramycin | (noun) an antibiotic (trade name Nebcin) that is especially effective against Gram-negative bacteria | Synonyms: Nebcin |
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| tocsin | (noun) a bell used to sound an alarm | Synonyms: warning bell |
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| (noun) the sound of an alarm (usually a bell) | Synonyms: alarm bell |
| topspin | (noun) forward spin (usually of a moving ball) that is imparted by an upward stroke | - |
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| toxin | (noun) a poisonous substance produced during the metabolism and growth of certain microorganisms and some higher plant and animal species | - |
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| train | (noun) public transport provided by a line of railway cars coupled together and drawn by a locomotive | Synonyms: railroad train |
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| (noun) wheelwork consisting of a connected set of rotating gears by which force is transmitted or motion or torque is changed | Synonyms: gear, gearing, geartrain, power train |
| (noun) piece of cloth forming the long back section of a gown that is drawn along the floor | - |
| (noun) a series of consequences wrought by an event | - |
| (noun) a procession (of wagons or mules or camels) traveling together in single file | Synonyms: caravan, wagon train |
| (noun) a sequentially ordered set of things or events or ideas in which each successive member is related to the preceding | Synonyms: string |
| (verb) exercise in order to prepare for an event or competition | - |
| (verb) undergo training or instruction in preparation for a particular role, function, or profession | Synonyms: prepare |
| (verb) create by training and teaching | Synonyms: develop, educate, prepare |
| (verb) teach and supervise (someone); act as a trainer or coach (to), as in sports | Synonyms: coach |
| (verb) point or cause to go (blows, weapons, or objects such as photographic equipment) towards | Synonyms: aim, direct, take, take aim |
| (verb) drag loosely along a surface; allow to sweep the ground | Synonyms: trail |
| (verb) travel by rail or train | Synonyms: rail |
| (verb) educate for a future role or function | Synonyms: groom, prepare |
| (verb) teach or refine to be discriminative in taste or judgment | Synonyms: civilise, civilize, cultivate, educate, school |
| (verb) develop (a child's or animal's) behavior by instruction and practice; especially to teach self-control | Synonyms: check, condition, discipline |
| (verb) cause to grow in a certain way by tying and pruning it | - |
| transferrin | (noun) a globulin in blood plasma that carries iron | Synonyms: beta globulin, siderophilin |
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| tributyrin | (noun) a bitter oily triglyceride of butyric acid; a form of butyrin | - |
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| trinitroglycerin | (noun) a heavy yellow poisonous oily explosive liquid obtained by nitrating glycerol; used in making explosives and medically as a vasodilator (trade names Nitrospan and Nitrostat) | Synonyms: glyceryl trinitrate, nitroglycerin, nitroglycerine, Nitrospan, Nitrostat |
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| triolein | (noun) a naturally occurring glyceride of oleic acid that is found in fats and oils | Synonyms: olein |
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| tripalmitin | (noun) a triglyceride of palmitic acid | Synonyms: glycerol tripalmitate |
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| tristearin | (noun) a triglyceride of stearic acid | Synonyms: glycerol tristearate |
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| trypsin | (noun) an enzyme of pancreatic origin; catalyzes the hydrolysis of proteins to smaller polypeptide units | - |
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| tuberculin | (noun) a sterile liquid containing a purified protein derivative of the tuberculosis bacterium; used in the diagnosis of tuberculosis | - |
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| turnverein | (noun) a club of tumblers or gymnasts | - |
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| twain | (noun) two items of the same kind | Synonyms: brace, couple, couplet, distich, duad, duet, duo, dyad, pair, span, twosome, yoke |
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| twin | (adjective) being two identical | Synonyms: duplicate, matching, twinned |
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| (noun) a duplicate copy | Synonyms: counterpart, similitude |
| (noun) either of two offspring born at the same time from the same pregnancy | - |
| (verb) give birth to twins | - |
| (verb) grow as twins | - |
| (verb) bring two objects, ideas, or people together | Synonyms: couple, match, mate, pair |
| (verb) duplicate or match | Synonyms: duplicate, parallel |
| tyrocidin | (noun) a basic polypeptide antibiotic derived from a soil bacterium; a major component of tyrothricin | Synonyms: tyrocidine |
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| tyrothricin | (noun) a mixture of antibiotics applied locally to infections caused by Gram-positive bacteria | - |
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| uncertain | (adjective) not established beyond doubt; still undecided or unknown | - |
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| (adjective) lacking or indicating lack of confidence or assurance | Synonyms: incertain, unsure |
| (adjective) not certain to occur; not inevitable | - |
| (adjective) not established or confirmed | Synonyms: unsealed |
| (adjective) ambiguous (especially in the negative) | - |
| (adjective) not consistent or dependable | - |
| (adjective) subject to change | Synonyms: changeable, unsettled |
| unchain | (verb) remove the chains from | - |
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| (verb) make free | - |
| underpin | (verb) support from beneath | - |
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| (verb) support with evidence or authority or make more certain or confirm | Synonyms: bear out, corroborate, support |
| unpin | (verb) remove the pins from; unfasten the pins of | - |
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| unstrain | (verb) cause to feel relaxed | Synonyms: loosen up, make relaxed, relax, unlax, unwind |
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| urchin | (noun) poor and often mischievous city child | - |
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| urobilin | (noun) brown bile pigment formed from urobilinogens and found in feces and in small amounts in urine | - |
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| vain | (adjective) characteristic of false pride; having an exaggerated sense of self-importance | Synonyms: conceited, egotistic, egotistical, self-conceited, swollen-headed, swollen |
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| (adjective) unproductive of success | Synonyms: bootless, fruitless, futile, sleeveless |
| vancomycin | (noun) an antibiotic (trade name Vancocin) effective against some bacterial infections | Synonyms: Vancocin |
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| vanillin | (noun) a crystalline compound found in vanilla beans and some balsam resins; used in perfumes and flavorings | - |
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| vasopressin | (noun) hormone secreted by the posterior pituitary gland (trade name Pitressin) and also by nerve endings in the hypothalamus; affects blood pressure by stimulating capillary muscles and reduces urine flow by affecting reabsorption of water by kidney tubules | Synonyms: ADH, antidiuretic hormone, Pitressin |
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| vein | (noun) one of the horny ribs that stiffen and support the wing of an insect | Synonyms: nervure |
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| (noun) a blood vessel that carries blood from the capillaries toward the heart | Synonyms: vena, venous blood vessel |
| (noun) a distinctive style or manner | - |
| (noun) a layer of ore between layers of rock | Synonyms: mineral vein |
| (noun) any of the vascular bundles or ribs that form the branching framework of conducting and supporting tissues in a leaf or other plant organ | Synonyms: nervure |
| (verb) make a veinlike pattern | - |
| verdin | (noun) very small yellow-headed titmouse of western North America | Synonyms: Auriparus flaviceps |
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| vermin | (noun) any of various small animals or insects that are pests; e.g. cockroaches or rats | - |
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| (noun) an irritating or obnoxious person | Synonyms: varmint |
| vervain | (noun) any of numerous tropical or subtropical American plants of the genus Verbena grown for their showy spikes of variously colored flowers | Synonyms: verbena |
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| villain | (noun) a wicked or evil person; someone who does evil deliberately | Synonyms: scoundrel |
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| (noun) the principal bad character in a film or work of fiction | Synonyms: baddie |
| villein | (noun) (Middle Ages) a person who is bound to the land and owned by the feudal lord | Synonyms: helot, serf |
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| violin | (noun) bowed stringed instrument that is the highest member of the violin family; this instrument has four strings and a hollow body and an unfretted fingerboard and is played with a bow | Synonyms: fiddle |
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| viomycin | (noun) a basic polypeptide antibiotic (trade name Viocin) administered intramuscularly (along with other drugs) in the treatment of tuberculosis | Synonyms: Viocin |
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| virgin | (adjective) in a state of sexual virginity | Synonyms: pure, vestal, virginal, virtuous |
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| (adjective) being used or worked for the first time | - |
| (noun) a person who has never had sex | - |
| vitamin | (noun) any of a group of organic substances essential in small quantities to normal metabolism | - |
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| wain | (noun) large open farm wagon | - |
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| warfarin | (noun) an anticoagulant (trade name Coumadin) use to prevent and treat a thrombus or embolus | Synonyms: Coumadin |
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| washbasin | (noun) a basin for washing the hands | Synonyms: handbasin, lavabo, wash-hand basin, washbowl |
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| (noun) a bathroom sink that is permanently installed and connected to a water supply and drainpipe; where you can wash your hands and face | Synonyms: basin, lavatory, washbowl, washstand |