| antiparticle | (noun) a particle that has the same mass as another particle but has opposite values for its other properties; interaction of a particle and its antiparticle results in annihilation and the production of radiant energy | - |
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| antipasto | (noun) a course of appetizers in an Italian meal | - |
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| antipathy | (noun) the object of a feeling of intense aversion; something to be avoided | - |
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| (noun) a feeling of intense dislike | Synonyms: aversion, distaste |
| antiperspirant | (noun) an astringent substance applied to the skin to reduce perspiration | - |
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| antiphon | (noun) a verse or song to be chanted or sung in response | Synonyms: antiphony |
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| antiphonal | (noun) bound collection of antiphons | Synonyms: antiphonary |
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| antiphonary | (noun) bound collection of antiphons | Synonyms: antiphonal |
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| antiphony | (noun) alternate (responsive) singing by a choir in two parts | - |
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| (noun) a verse or song to be chanted or sung in response | Synonyms: antiphon |
| antiphrasis | (noun) the use of a word in a sense opposite to its normal sense (especially in irony) | - |
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| antipodal | (noun) the relation of opposition along a diameter | Synonyms: antipodal opposition, diametrical opposition |
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| antipode | (noun) direct opposite | - |
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| antipodes | (noun) any two places or regions on diametrically opposite sides of the Earth | - |
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| antipope | (noun) someone who is elected pope in opposition to another person who is held to be canonically elected | - |
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| antiproton | (noun) an unstable negatively charged proton; the antiparticle of a proton | - |
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| antiprotozoal | (noun) a medicinal drug used to fight diseases (like malaria) that are caused by protozoa | Synonyms: antiprotozoal drug |
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| antipruritic | (noun) a substance that relieves or prevents itching | - |
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| antipsychotic | (noun) tranquilizer used to treat psychotic conditions when a calming effect is desired | Synonyms: antipsychotic agent, antipsychotic drug, major tranquilizer, major tranquilliser, major tranquillizer, neuroleptic, neuroleptic agent, neuroleptic drug |
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| antipyresis | (noun) medication with antipyretics to treat a fever | - |
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| antipyretic | (noun) any medicine that lowers body temperature to prevent or alleviate fever | Synonyms: febrifuge |
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| centipede | (noun) chiefly nocturnal predacious arthropod having a flattened body of 15 to 173 segments each with a pair of legs, the foremost pair being modified as prehensors | - |
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| constipation | (noun) the act of making something futile and useless (as by routine) | Synonyms: deadening, impairment, stultification |
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| (noun) irregular and infrequent or difficult evacuation of the bowels; can be a symptom of intestinal obstruction or diverticulitis | Synonyms: irregularity |
| fingertip | (noun) the end (tip) of a finger | - |
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| heeltip | (noun) The bottom end of a heel, usually made of plastic or metal. | Synonyms: heel tip |
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| multiple | (noun) the product of a quantity by an integer | - |
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| multiplex | (noun) a movie theater that has several different auditoriums in the same building | - |
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| (noun) communicates two or more signals over a common channel | - |
| multiplexer | (noun) a device that can interleave two or more activities | - |
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| multiplicand | (noun) the number that is multiplied by the multiplier | - |
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| multiplication | (noun) an arithmetic operation that is the inverse of division; the product of two numbers is computed | Synonyms: times |
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| (noun) the act of producing offspring or multiplying by such production | Synonyms: generation, propagation |
| (noun) a multiplicative increase | - |
| multiplicity | (noun) a large number | Synonyms: numerosity, numerousness |
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| (noun) the property of being multiple | - |
| multiplier | (noun) the number by which a multiplicand is multiplied | Synonyms: multiplier factor |
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| multiprocessing | (noun) simultaneous processing by two or more processing units | Synonyms: parallel processing |
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| multiprocessor | (noun) a computer that uses two or more processing units under integrated control | - |
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| multiprogramming | (noun) the execution of two or more computer programs by a single computer | Synonyms: concurrent execution |
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| obstipation | (noun) severe constipation resulting from an obstruction in the intestines | - |
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| pinnatiped | (noun) aquatic carnivorous mammal having a streamlined body specialized for swimming with limbs modified as flippers | Synonyms: pinniped, pinniped mammal |
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| protip | (noun) an insightful bit of advice | - |
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| quintipara | (noun) (obstetrics) woman who has given birth to a viable infant in each of five pregnancies | - |
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| silvertip | (noun) powerful brownish-yellow bear of the uplands of western North America | Synonyms: grizzly, grizzly bear, silver-tip, Ursus arctos horribilis, Ursus horribilis |
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| stipe | (noun) supporting stalk or stem-like structure especially of a pistil or fern frond or supporting a mushroom cap | - |
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| stipend | (noun) a sum of money allotted on a regular basis; usually for some specific purpose | - |
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| stipendiary | (noun) (United Kingdom) a paid magistrate (appointed by the Home Secretary) dealing with police cases | Synonyms: stipendiary magistrate |
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| stippler | (noun) a painter who stipples (creates a stippled effect) | - |
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| stipulation | (noun) a restriction that is insisted upon as a condition for an agreement | Synonyms: specification |
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| (noun) an assumption on which rests the validity or effect of something else | Synonyms: condition, precondition |
| (noun) (law) an agreement or concession made by parties in a judicial proceeding (or by their attorneys) relating to the business before the court; must be in writing unless they are part of the court record | Synonyms: judicial admission |
| stipule | (noun) a small leafy outgrowth at the base of a leaf or its stalk; usually occurring in pairs and soon shed | - |
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| tidytips | (noun) California annual having flower heads with yellow rays tipped with white | Synonyms: Layia platyglossa, tidy tips |
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| tip | (noun) an indication of potential opportunity | Synonyms: confidential information, hint, lead, steer, wind |
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| (noun) the extreme end of something; especially something pointed | - |
| (noun) the top or extreme point of something (usually a mountain or hill) | Synonyms: crest, crown, peak, summit, top |
| (noun) a relatively small amount of money given for services rendered (as by a waiter) | Synonyms: backsheesh, baksheesh, bakshis, bakshish, gratuity, pourboire |
| (noun) a V shape | Synonyms: peak, point |
| tipi | (noun) a Native American tent; usually of conical shape | Synonyms: teepee, tepee |
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| tipper | (noun) truck whose contents can be emptied without handling; the front end of the platform can be pneumatically raised so that the load is discharged by gravity | Synonyms: dump truck, dumper, tip truck, tipper lorry, tipper truck |
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| (noun) a person who leaves a tip | - |
| tippet | (noun) a woman's fur shoulder cape with hanging ends; often consisting of the whole fur of a fox or marten | - |
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| tipple | (noun) a serving of drink (usually alcoholic) drawn from a keg | Synonyms: draft, draught, potation |
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| tippler | (noun) someone who drinks liquor repeatedly in small quantities | Synonyms: social drinker |
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| tipsiness | (noun) a temporary state resulting from excessive consumption of alcohol | Synonyms: drunkenness, inebriation, inebriety, insobriety, intoxication |
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| tipstaff | (noun) staff with a metal tip carried as a sign of office by e.g. a bailiff or constable | - |
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| tipster | (noun) one who sells advice about gambling or speculation (especially at the racetrack) | Synonyms: tout |
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| tiptoe | (noun) the tip of a toe | - |
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| tiptop | (noun) the extreme top or summit | - |
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| (noun) the highest level or degree attainable; the highest stage of development | Synonyms: acme, elevation, height, meridian, peak, pinnacle, summit, superlative, top |
| tipu | (noun) semi-evergreen South American tree with odd-pinnate leaves and golden yellow flowers cultivated as an ornamental | Synonyms: pride of Bolivia, tipu tree, yellow jacaranda |
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| totipotence | (noun) the ability of a cell to give rise to unlike cells and so to develop a new organism or part | Synonyms: totipotency |
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| totipotency | (noun) the ability of a cell to give rise to unlike cells and so to develop a new organism or part | Synonyms: totipotence |
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