| apocrine | (adjective) (of exocrine glands) producing a secretion in which part of the secreting cell is released with the secretion | - |
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| apomorphine | (noun) a morphine derivative that is not as strong as morphine; used as an emetic and in small doses as a sedative | - |
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| appalling | (adjective) causing consternation | Synonyms: dismaying |
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| (noun) an experience that appalls | - |
| appallingly | (adverb) to an appalling extent | - |
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| appealing | (adjective) able to attract interest or draw favorable attention | - |
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| (adjective) (of characters in literature or drama) evoking empathic or sympathetic feelings | Synonyms: likable, likeable, sympathetic |
| appealingly | (adverb) in an appealing manner | - |
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| appealingness | (noun) attractiveness that interests or pleases or stimulates | Synonyms: appeal, charm |
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| appearing | (noun) formal attendance (in court or at a hearing) of a party in an action | Synonyms: appearance, coming into court |
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| appeasing | (adjective) intended to pacify by acceding to demands or granting concessions | Synonyms: placating, placative, placatory |
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| appertain | (verb) be a part or attribute of | Synonyms: pertain |
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| appetising | (adjective) appealing to or stimulating the appetite especially in appearance or aroma | Synonyms: appetizing |
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| appetisingness | (noun) the property of stimulating the appetite | Synonyms: appetizingness |
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| appetizing | (adjective) appealing to or stimulating the appetite especially in appearance or aroma | Synonyms: appetising |
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| appetizingness | (noun) the property of stimulating the appetite | Synonyms: appetisingness |
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| applemint | (noun) mint with apple-scented stems of southern and western Europe; naturalized in United States | Synonyms: apple mint, Mentha rotundifolia, Mentha suaveolens |
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| appoint | (verb) furnish | - |
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| (verb) assign a duty, responsibility or obligation to | Synonyms: charge |
| (verb) create and charge with a task or function | Synonyms: constitute, name, nominate |
| appointed | (adjective) subject to appointment | Synonyms: appointive |
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| (adjective) selected for a job | - |
| (adjective) provided with furnishing and accessories (especially of a tasteful kind) | - |
| (adjective) fixed or established especially by order or command | Synonyms: decreed, ordained, prescribed |
| appointee | (noun) an official who is appointed | - |
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| (noun) a person who is appointed to a job or position | Synonyms: appointment |
| appointive | (adjective) subject to appointment | Synonyms: appointed |
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| (adjective) relating to the act of appointing | - |
| appointment | (noun) the act of putting a person into a non-elective position | Synonyms: assignment, designation, naming |
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| (noun) the job to which you are (or hope to be) appointed | - |
| (noun) (law) the act of disposing of property by virtue of the power of appointment | - |
| (noun) (usually in the plural) furnishings and equipment (especially for a ship or hotel) | Synonyms: fitting |
| (noun) a meeting arranged in advance | Synonyms: date, engagement |
| (noun) a person who is appointed to a job or position | Synonyms: appointee |
| apportioning | (noun) the act of distributing by allotting or apportioning; distribution according to a plan | Synonyms: allocation, allotment, apportionment, assignation, parceling, parcelling |
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| appraising | (adjective) exercising or involving careful evaluations | Synonyms: evaluative |
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| approaching | (adjective) of the relatively near future | Synonyms: coming, forthcoming, upcoming |
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| (noun) the act of drawing spatially closer to something | Synonyms: approach, coming |
| (noun) the temporal property of becoming nearer in time | Synonyms: approach, coming |
| (noun) the event of one object coming closer to another | Synonyms: approach |
| approving | (adjective) expressing or manifesting praise or approval | Synonyms: affirmative, approbative, approbatory, plausive |
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| (noun) the formal act of approving | Synonyms: approval, blessing |
| approvingly | (adverb) in an approving manner | - |
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| aptitudinal | (adjective) of or relating to aptitudes | - |
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| aquamarine | (noun) a shade of blue tinged with green | Synonyms: aqua, cobalt blue, greenish blue, peacock blue, turquoise |
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| (noun) a transparent variety of beryl that is blue green in color | - |
| aquatint | (noun) a method of etching that imitates the broad washes of a water color | - |
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| (noun) an etching made by a process that makes it resemble a water color | - |
| (verb) etch in aquatint | - |
| aquiline | (adjective) curved down like an eagle's beak | Synonyms: hooked |
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| arbitrariness | (noun) the trait of acting unpredictably and more from whim or caprice than from reason or judgment | Synonyms: capriciousness, flightiness, whimsey, whimsicality, whimsy |
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| arccosine | (noun) the inverse function of the cosine; the angle that has a cosine equal to a given number | Synonyms: arc cosine, arccos, inverse cosine |
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| archine | (noun) a Russian unit of length (71 cm) | - |
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| arching | (adjective) forming or resembling an arch | Synonyms: arced, arched, arciform, arcuate, bowed |
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| arcminute | (noun) a unit of angular distance equal to a 60th of a degree | Synonyms: minute, minute of arc |
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| arcsin | (noun) the inverse function of the sine; the angle that has a sine equal to a given number | Synonyms: arc sine, arcsine, inverse sine |
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| arcsine | (noun) the inverse function of the sine; the angle that has a sine equal to a given number | Synonyms: arc sine, arcsin, inverse sine |
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| argentine | (noun) any of various small silver-scaled salmon-like marine fishes | - |
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| argentinosaur | (noun) huge herbivorous dinosaur of Cretaceous found in Argentina | - |
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| arginine | (noun) a bitter tasting amino acid found in proteins and necessary for nutrition; its absence from the diet leads to a reduced production of spermatozoa | - |
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| arguing | (noun) a contentious speech act; a dispute where there is strong disagreement | Synonyms: argument, contention, contestation, controversy, disceptation, disputation, tilt |
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| arming | (noun) the act of equipping with weapons in preparation for war | Synonyms: armament, equipping |
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| arranging | (noun) the act of arranging and adapting a piece of music | Synonyms: arrangement, transcription |
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| arresting | (adjective) commanding attention | Synonyms: sensational, stunning |
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| arsine | (noun) a poisonous colorless flammable gas used in organic synthesis and to dope transistors and as a poison gas in warfare | - |
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| arundinaceous | (adjective) of or relating to or resembling reedlike plants of the genus Arundinaria | - |
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| ascending | (adjective) moving or going or growing upward | - |
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| (noun) the act of changing location in an upward direction | Synonyms: ascension, ascent, rise |
| ascertain | (verb) be careful or certain to do something; make certain of something | Synonyms: assure, check, control, ensure, insure, see, see to it |
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| (verb) learn or discover with certainty | - |
| (verb) find out, learn, or determine with certainty, usually by making an inquiry or other effort | Synonyms: check, determine, find out, learn, see, watch |
| (verb) establish after a calculation, investigation, experiment, survey, or study | Synonyms: determine, find, find out |
| ascertainable | (adjective) capable of being ascertained or found out | Synonyms: discoverable |
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| ascertained | (adjective) discovered or determined by scientific observation | Synonyms: discovered, observed |
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| ashbin | (noun) a bin that holds rubbish until it is collected | Synonyms: ash-bin, ash bin, ashcan, dustbin, garbage can, trash barrel, trash bin, trash can, wastebin |
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| asinine | (adjective) extremely silly or stupid | Synonyms: fatuous, inane |
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| asininity | (noun) the quality of being asinine; stupidity combined with stubbornness | - |
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| asking | (noun) the verbal act of requesting | Synonyms: request |
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| asparaginase | (noun) antineoplastic drug (trade name Elspar) sometimes used to treat lymphoblastic leukemia | Synonyms: Elspar |
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| asparagine | (noun) a crystalline amino acid found in proteins and in many plants (e.g., asparagus) | - |
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| asphyxiating | (adjective) tending to deprive of oxygen | - |
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| aspirin | (noun) the acetylated derivative of salicylic acid; used as an analgesic anti-inflammatory drug (trade names Bayer, Empirin, and St. Joseph) usually taken in tablet form; used as an antipyretic; slows clotting of the blood by poisoning platelets | Synonyms: acetylsalicylic acid, Bayer, Empirin, St. Joseph |
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| aspiring | (adjective) desiring or striving for recognition or advancement | Synonyms: aspirant, wishful |
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| asquint | (adjective) (used especially of glances) directed to one side with or as if with doubt or suspicion or envy | Synonyms: askance, askant, sidelong, squint-eyed, squint, squinty |
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| assassin | (noun) a murderer (especially one who kills a prominent political figure) who kills by a surprise attack and often is hired to do the deed | Synonyms: assassinator, bravo |
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| (noun) a member of a secret order of Muslims (founded in the 12th century) who terrorized and killed Christian Crusaders | - |
| assassinate | (verb) destroy or damage seriously, as of someone's reputation | - |
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| (verb) murder; especially of socially prominent persons | - |
| assassinated | (adjective) murdered by surprise attack for political reasons | - |
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| assassination | (noun) murder of a public figure by surprise attack | - |
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| (noun) an attack intended to ruin someone's reputation | Synonyms: blackwash, character assassination |
| assassinator | (noun) a murderer (especially one who kills a prominent political figure) who kills by a surprise attack and often is hired to do the deed | Synonyms: assassin, bravo |
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| assembling | (noun) the act of gathering something together | Synonyms: aggregation, collecting, collection |
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| assenting | (adjective) expressing agreement or consent | Synonyms: assentient |
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| (noun) agreeing with or consenting to (often unwillingly) | Synonyms: accession |
| asserting | (adjective) relating to the use of or having the nature of a declaration | Synonyms: declarative, declaratory |
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| assigning | (noun) the act of distributing something to designated places or persons | Synonyms: assignment |
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| assimilating | (adjective) capable of taking (gas, light, or liquids) into a solution | Synonyms: assimilative, assimilatory |
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| assuming | (adjective) excessively forward | Synonyms: assumptive, presumptuous |
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| assuring | (adjective) giving confidence | - |
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| astatine | (noun) a highly unstable radioactive element (the heaviest of the halogen series); a decay product of uranium and thorium | Synonyms: At, atomic number 85 |
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| astonishing | (adjective) so surprisingly impressive as to stun or overwhelm | Synonyms: astounding, staggering, stupefying |
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| (adjective) surprising greatly | Synonyms: amazing |
| astonishingly | (adverb) in an amazing manner; to everyone's surprise | Synonyms: amazingly, surprisingly |
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| astounding | (adjective) so surprisingly impressive as to stun or overwhelm | Synonyms: astonishing, staggering, stupefying |
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| (adjective) bewildering or striking dumb with wonder | Synonyms: dumbfounding, dumfounding |
| astringe | (verb) become constricted or compressed | - |
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| (verb) constrict or bind or draw together | - |
| astringence | (noun) a sharp astringent taste; the taste experience when a substance causes the mouth to pucker | Synonyms: astringency |
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| astringency | (noun) the ability to contract or draw together soft body tissues to check blood flow or restrict secretion of fluids | Synonyms: stypsis |
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| (noun) a sharp astringent taste; the taste experience when a substance causes the mouth to pucker | Synonyms: astringence |
| astringent | (adjective) tending to draw together or constrict soft organic tissue | - |
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| (adjective) sour or bitter in taste | Synonyms: acerb, acerbic |
| (noun) a drug that causes contraction of body tissues and canals | Synonyms: astringent drug, styptic |
| atorvastatin | (noun) an oral drug (trade name Lipitor) that is effective in lowering triglycerides; potent in reducing LDL cholesterol because higher doses can be given | Synonyms: Lipitor |
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| atrazine | (noun) a synthetic compound derived from triazine that is widely used as an agricultural herbicide | - |
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| atropine | (noun) a poisonous crystalline alkaloid extracted from the nightshade family; used as an antispasmodic and to dilate the eye pupil; also administered in large amounts as an antidote for organophosphate nerve agents or organophosphate insecticides | - |
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| attacking | (adjective) disposed to attack | Synonyms: assaultive |
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| attain | (verb) reach a point in time, or a certain state or level | Synonyms: hit, reach |
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| (verb) reach a destination, either real or abstract | Synonyms: arrive at, gain, hit, make, reach |
| (verb) find unexpectedly | Synonyms: chance on, chance upon, come across, come upon, discover, fall upon, happen upon, light upon, strike |
| (verb) to gain with effort | Synonyms: accomplish, achieve, reach |
| attainability | (noun) the state of being achievable | Synonyms: achievability, attainableness |
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| attainable | (adjective) capable of being attained or accomplished | Synonyms: come-at-able |
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| attainableness | (noun) the state of being achievable | Synonyms: achievability, attainability |
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| attainder | (noun) cancellation of civil rights | Synonyms: civil death |
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| attained | (adjective) achieved or reached | - |
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| attainment | (noun) the act of achieving an aim | - |
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| (noun) arrival at a new stage | - |
| (noun) an ability that has been acquired by training | Synonyms: accomplishment, acquirement, acquisition, skill |
| attaint | (verb) condemn by attainder | - |
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| (verb) bring shame or dishonor upon | Synonyms: disgrace, dishonor, dishonour, shame |
| attending | (adjective) giving practical help to | Synonyms: ministrant |
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| (noun) the act of being present (at a meeting or event etc.) | Synonyms: attendance |
| (noun) the process whereby a person concentrates on some features of the environment to the (relative) exclusion of others | Synonyms: attention |
| attitudinal | (adjective) of or relating to attitudes | - |
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| attitudinise | (verb) assume certain affected attitudes | Synonyms: attitudinize |
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| attitudinize | (verb) assume certain affected attitudes | Synonyms: attitudinise |
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| aubergine | (noun) egg-shaped vegetable having a shiny skin typically dark purple but occasionally white or yellow | Synonyms: eggplant, mad apple |
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| (noun) hairy upright herb native to southeastern Asia but widely cultivated for its large glossy edible fruit commonly used as a vegetable | Synonyms: brinjal, eggplant, eggplant bush, garden egg, mad apple, Solanum melongena |
| australopithecine | (adjective) of or belonging to the hominid genus Australopithecus | - |
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| (noun) any of several extinct humanlike bipedal primates with relatively small brains of the genus Australopithecus; from 1 to 4 million years ago | - |
| autoinjector | (noun) a hypodermic syringe to use in injecting yourself with a liquid | - |
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| autoloading | (adjective) (of firearms) capable of automatic loading and firing continuously | Synonyms: self-loading, semiautomatic |
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| autosexing | (noun) (especially of domestic fowl) breeding to reveal differential sex characteristics at hatching | - |
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