| alveolus | (noun) a tiny sac for holding air in the lungs; formed by the terminal dilation of tiny air passageways | Synonyms: air cell, air sac |
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| (noun) a bony socket in the alveolar ridge that holds a tooth | Synonyms: tooth socket |
| alvine | (adjective) of or relating to the intestines | - |
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| amadavat | (noun) red Asian weaverbirds often kept as cage birds | Synonyms: avadavat |
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| amalgamative | (adjective) characterized by or tending toward amalgamation | - |
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| amative | (adjective) inclined toward or displaying love | Synonyms: amorous |
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| amativeness | (noun) the arousal of feelings of sexual desire | Synonyms: amorousness, eroticism, erotism, sexiness |
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| ambivalence | (noun) mixed feelings or emotions | Synonyms: ambivalency |
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| ambivalency | (noun) mixed feelings or emotions | Synonyms: ambivalence |
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| ambivalent | (adjective) uncertain or unable to decide about what course to follow | - |
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| ambiversion | (noun) (psychology) a balanced disposition intermediate between extroversion and introversion | - |
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| ambiversive | (adjective) intermediate between introversive and extroversive | - |
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| ameliorative | (adjective) tending to ameliorate | Synonyms: ameliorating, amelioratory, meliorative |
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| amusive | (adjective) providing enjoyment; pleasantly entertaining | Synonyms: amusing, diverting |
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| anchovy | (noun) small herring-like plankton-eating fishes often canned whole or as paste; abundant in tropical waters worldwide | - |
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| (noun) tiny fishes usually canned or salted; used for hors d'oeuvres or as seasoning in sauces | - |
| animadversion | (noun) harsh criticism or disapproval | Synonyms: censure |
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| animadvert | (verb) express one's opinion openly and without fear or hesitation | Synonyms: opine, sound off, speak out, speak up |
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| (verb) express blame or censure or make a harshly critical remark | - |
| annihilative | (adjective) wreaking or capable of wreaking complete destruction | Synonyms: annihilating, devastating, withering |
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| anniversary | (noun) the date on which an event occurred in some previous year (or the celebration of it) | Synonyms: day of remembrance |
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| anovulant | (noun) a contraceptive in the form of a pill containing estrogen and progestin to inhibit ovulation and so prevent conception | Synonyms: anovulatory drug, birth control pill, contraceptive pill, oral contraceptive, oral contraceptive pill, pill |
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| anovulation | (noun) the absence of ovulation due to immaturity or post-maturity or pregnancy or oral contraceptive pills or dysfunction of the ovary | - |
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| antediluvial | (adjective) of or relating to the period before the biblical flood | Synonyms: antediluvian |
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| antediluvian | (adjective) of or relating to the period before the biblical flood | Synonyms: antediluvial |
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| (adjective) so extremely old as seeming to belong to an earlier period | Synonyms: antiquated, archaic |
| (noun) a very old person | Synonyms: ancient |
| (noun) any of the early patriarchs who lived prior to the Noachian deluge | Synonyms: antediluvian patriarch |
| anticipative | (adjective) marked by eager anticipation | Synonyms: anticipant, expectant |
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| anticoagulative | (adjective) of or relating to an anticoagulant | - |
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| anticonvulsant | (noun) a drug used to treat or prevent convulsions (as in epilepsy) | Synonyms: anticonvulsant drug, antiepileptic, antiepileptic drug |
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| antihypertensive | (noun) a drug that reduces high blood pressure | Synonyms: antihypertensive drug |
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| antitussive | (noun) any medicine used to suppress or relieve coughing | - |
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| antivenene | (noun) an antitoxin that counteracts the effects of venom from the bite of a snake or insect or other animal | Synonyms: antivenin |
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| antivenin | (noun) an antitoxin that counteracts the effects of venom from the bite of a snake or insect or other animal | Synonyms: antivenene |
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| antiviral | (adjective) inhibiting or stopping the growth and reproduction of viruses | - |
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| (noun) any drug that destroys viruses | Synonyms: antiviral agent, antiviral drug |
| anvil | (noun) a heavy block of iron or steel on which hot metals are shaped by hammering | - |
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| (noun) a small bone in the middle ear between the malleus and the stapes | Synonyms: incus |
| apivorous | (adjective) feeding on bees | - |
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| apojove | (noun) apoapsis in orbit around Jupiter | - |
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| appellative | (adjective) pertaining to or dealing with or used as a common noun | - |
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| (adjective) inclined to or serving for the giving of names | Synonyms: naming |
| (noun) identifying word or words by which someone or something is called and classified or distinguished from others | Synonyms: appellation, denomination, designation |
| apperceive | (verb) perceive in terms of a past experience | - |
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| apperceptive | (adjective) able to relate new percepts to past experience | - |
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| appetitive | (adjective) of or relating to appetite | - |
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| applicative | (adjective) readily applicable or practical | Synonyms: applicatory |
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| appointive | (adjective) subject to appointment | Synonyms: appointed |
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| (adjective) relating to the act of appointing | - |
| appositive | (adjective) relating to or being in apposition | Synonyms: appositional |
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| appositively | (adverb) in an appositive manner | Synonyms: in apposition |
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| appreciative | (adjective) having or showing appreciation or a favorable critical judgment or opinion | - |
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| (adjective) feeling or expressive of gratitude | - |
| appreciatively | (adverb) with appreciation; in a grateful manner | Synonyms: gratefully |
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| appreciativeness | (noun) warm friendly feelings of gratitude | Synonyms: gratefulness, thankfulness |
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| apprehensive | (adjective) in fear or dread of possible evil or harm | - |
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| (adjective) quick to understand | Synonyms: discerning |
| (adjective) mentally upset over possible misfortune or danger etc | Synonyms: worried |
| apprehensively | (adverb) with anxiety or apprehension | Synonyms: anxiously, uneasily |
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| apprehensiveness | (noun) fearful expectation or anticipation | Synonyms: apprehension, dread |
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| approbative | (adjective) expressing or manifesting praise or approval | Synonyms: affirmative, approbatory, approving, plausive |
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| appropriative | (adjective) of or relating to or given to the act of taking for yourself | - |
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| approval | (noun) the formal act of approving | Synonyms: approving, blessing |
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| (noun) a message expressing a favorable opinion | Synonyms: commendation |
| (noun) a feeling of liking something or someone good | - |
| (noun) acceptance as satisfactory | Synonyms: favorable reception, favourable reception |
| approve | (verb) judge to be right or commendable; think well of | - |
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| (verb) give sanction to | Synonyms: O.K., okay, sanction |
| approved | (adjective) established by authority; given authoritative approval | Synonyms: sanctioned |
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| approver | (noun) an authority with power to approve | - |
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| 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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| approximative | (adjective) not quite exact or correct | Synonyms: approximate, rough |
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| aquavit | (noun) Scandinavian liquor usually flavored with caraway seeds | Synonyms: akvavit |
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| arbitrative | (adjective) relating to or having the authority to arbitrate | - |
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| arborvirus | (noun) a large heterogeneous group of RNA viruses divisible into groups on the basis of the virions; they have been recovered from arthropods, bats, and rodents; most are borne by arthropods; they are linked by the epidemiologic concept of transmission between vertebrate hosts by arthropod vectors (mosquitoes, ticks, sandflies, midges, etc.) that feed on blood; they can cause mild fevers, hepatitis, hemorrhagic fever, and encephalitis | Synonyms: arbovirus |
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| arborvitae | (noun) any of several Asian and North American conifers of the genera Thuja and Thujopsis | - |
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| arbovirus | (noun) a large heterogeneous group of RNA viruses divisible into groups on the basis of the virions; they have been recovered from arthropods, bats, and rodents; most are borne by arthropods; they are linked by the epidemiologic concept of transmission between vertebrate hosts by arthropod vectors (mosquitoes, ticks, sandflies, midges, etc.) that feed on blood; they can cause mild fevers, hepatitis, hemorrhagic fever, and encephalitis | Synonyms: arborvirus |
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| architrave | (noun) the lowest part of an entablature; rests immediately on the capitals of the columns | - |
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| (noun) the molding around a door or window | - |
| archival | (adjective) of or relating to or contained in or serving as an archive | - |
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| archive | (noun) a depository containing historical records and documents | - |
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| (verb) put into an archive | Synonyms: file away |
| archives | (noun) collection of records especially about an institution | - |
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| archivist | (noun) a person in charge of collecting and cataloguing archives | - |
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| arenavirus | (noun) animal viruses belonging to the family Arenaviridae | - |
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| argumentative | (adjective) given to or characterized by argument | - |
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| argumentatively | (adverb) in a disputatious manner | Synonyms: disputatiously |
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| arrival | (noun) accomplishment of an objective | Synonyms: reaching |
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| (noun) the act of arriving at a certain place | - |
| (noun) someone who arrives (or has arrived) | Synonyms: arriver, comer |
| arrive | (verb) reach a destination; arrive by movement or progress | Synonyms: come, get |
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| (verb) succeed in a big way; get to the top | Synonyms: get in, go far, make it |
| arrivederci | (noun) a farewell remark | Synonyms: adieu, adios, au revoir, auf wiedersehen, bye-bye, bye, cheerio, good-by, good-bye, good day, goodby, goodbye, sayonara, so long |
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| arriver | (noun) someone who arrives (or has arrived) | Synonyms: arrival, comer |
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| arriviste | (noun) a person who has suddenly risen to a higher economic status but has not gained social acceptance of others in that class | Synonyms: nouveau-riche, parvenu, upstart |
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| arteriovenous | (adjective) connecting an artery to a vein | - |
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| articulative | (adjective) of or relating to articulation | Synonyms: articulatory |
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| ascensive | (adjective) tending or directed upward | Synonyms: ascendant, ascendent |
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| assaultive | (adjective) disposed to attack | Synonyms: attacking |
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| assertive | (adjective) aggressively self-assured | Synonyms: self-asserting, self-assertive |
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| assertively | (adverb) in an assertive manner | - |
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| assertiveness | (noun) aggressive self-assurance; given to making bold assertions | Synonyms: self-assertiveness |
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| asseverate | (verb) state categorically | Synonyms: assert, maintain |
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| asseveration | (noun) a declaration that is made emphatically (as if no supporting evidence were necessary) | Synonyms: assertion, averment |
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| asseverator | (noun) someone who claims to speak the truth | Synonyms: affirmer, asserter, avower, declarer |
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| assimilative | (adjective) capable of taking (gas, light, or liquids) into a solution | Synonyms: assimilating, assimilatory |
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| (adjective) capable of mentally absorbing | - |
| assistive | (adjective) giving assistance | - |
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| associative | (adjective) characterized by or causing or resulting from the process of bringing ideas or events together in memory or imagination | Synonyms: associatory |
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| assuasive | (adjective) freeing from fear and anxiety | Synonyms: soothing |
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| assumptive | (adjective) accepted as real or true without proof | - |
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| (adjective) excessively forward | Synonyms: assuming, presumptuous |
| astronavigation | (noun) navigating according to the positions of the stars | Synonyms: celestial navigation |
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| atavism | (noun) a reappearance of an earlier characteristic | Synonyms: reversion, throwback |
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| atavist | (noun) an organism that has the characteristics of a more primitive type of that organism | Synonyms: throwback |
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| atavistic | (adjective) characteristic of an atavist | Synonyms: throwback |
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| 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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| atrioventricular | (adjective) relating to or affecting the atria and ventricles of the heart | Synonyms: auriculoventricular |
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| attentive | (adjective) (often followed by `to') giving care or attention | - |
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| (adjective) taking heed; giving close and thoughtful attention | Synonyms: heedful, paying attention, thoughtful |
| attentively | (adverb) with attention; in an attentive manner | - |
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| attentiveness | (noun) the trait of being considerate and thoughtful of others | - |
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| (noun) the trait of being observant and paying attention | - |
| (noun) paying particular notice (as to children or helpless people) | Synonyms: heed, paying attention, regard |
| attractive | (adjective) pleasing to the eye or mind especially through beauty or charm | - |
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| (adjective) having the properties of a magnet; the ability to draw or pull | - |
| (adjective) having power to arouse interest | - |
| attractively | (adverb) in a beautiful manner | Synonyms: beautifully |
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