| ant | (noun) social insect living in organized colonies; characteristically the males and fertile queen have wings during breeding season; wingless sterile females are the workers | Synonyms: emmet, pismire |
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| antacid | (noun) an agent that counteracts or neutralizes acidity (especially in the stomach) | Synonyms: alkaliser, alkalizer, antiacid, gastric antacid |
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| antagonism | (noun) (biochemistry) interference in or inhibition of the physiological action of a chemical substance by another having a similar structure | - |
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| (noun) an actively expressed feeling of dislike and hostility | - |
| (noun) the relation between opposing principles or forces or factors | - |
| (noun) a state of deep-seated ill-will | Synonyms: enmity, hostility |
| antagonist | (noun) a drug that neutralizes or counteracts the effects of another drug | - |
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| (noun) a muscle that relaxes while another contracts | - |
| (noun) someone who offers opposition | Synonyms: adversary, opponent, opposer, resister |
| antapex | (noun) the point opposite in direction from the solar apex; the point the solar system is moving away from | - |
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| antbird | (noun) any of various dull-colored South American birds that feeding on ants some following army ant swarms | Synonyms: ant bird |
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| ante | (noun) (poker) the initial contribution that each player makes to the pot | - |
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| anteater | (noun) any of several tropical American mammals of the family Myrmecophagidae which lack teeth and feed on ants and termites | Synonyms: New World anteater |
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| (noun) nocturnal burrowing mammal of the grasslands of Africa that feeds on termites; sole extant representative of the order Tubulidentata | Synonyms: aardvark, ant bear, Orycteropus afer |
| (noun) a burrowing monotreme mammal covered with spines and having a long snout and claws for hunting ants and termites; native to Australia | Synonyms: echidna, spiny anteater |
| (noun) a burrowing monotreme mammal covered with spines and having a long snout and claws for hunting ants and termites; native to New Guinea | Synonyms: echidna, spiny anteater |
| (noun) toothless mammal of southern Africa and Asia having a body covered with horny scales and a long snout for feeding on ants and termites | Synonyms: pangolin, scaly anteater |
| (noun) small Australian marsupial having long snout and strong claws for feeding on termites; nearly extinct | Synonyms: banded anteater, Myrmecobius fasciatus, numbat |
| antecedence | (noun) preceding in time | Synonyms: antecedency, anteriority, precedence, precedency, priority |
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| antecedency | (noun) preceding in time | Synonyms: antecedence, anteriority, precedence, precedency, priority |
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| antecedent | (noun) the referent of an anaphor; a phrase or clause that is referred to by an anaphoric pronoun | - |
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| (noun) a preceding occurrence or cause or event | - |
| (noun) someone from whom you are descended (but usually more remote than a grandparent) | Synonyms: ancestor, ascendant, ascendent, root |
| (noun) anything that precedes something similar in time | Synonyms: forerunner |
| antechamber | (noun) a large entrance or reception room or area | Synonyms: anteroom, entrance hall, foyer, hall, lobby, vestibule |
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| antediluvian | (noun) a very old person | Synonyms: ancient |
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| (noun) any of the early patriarchs who lived prior to the Noachian deluge | Synonyms: antediluvian patriarch |
| antefix | (noun) carved ornament at the eaves of a tile roof concealing the joints between tiles | - |
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| antelope | (noun) graceful Old World ruminant with long legs and horns directed upward and backward; includes gazelles, springboks, impalas, addax, gerenuks, blackbucks, dik-diks | - |
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| antenna | (noun) one of a pair of mobile appendages on the head of e.g. insects and crustaceans; typically sensitive to touch and taste | Synonyms: feeler |
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| (noun) an electrical device that sends or receives radio or television signals | Synonyms: aerial, transmitting aerial |
| (noun) sensitivity similar to that of a receptor organ | Synonyms: feeler |
| antepenult | (noun) the 3rd syllable of a word counting back from the end | Synonyms: antepenultima, antepenultimate |
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| antepenultima | (noun) the 3rd syllable of a word counting back from the end | Synonyms: antepenult, antepenultimate |
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| antepenultimate | (noun) the 3rd syllable of a word counting back from the end | Synonyms: antepenult, antepenultima |
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| anterior | (noun) a tooth situated at the front of the mouth | Synonyms: front tooth |
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| anteriority | (noun) the quality of being in front or (in lower animals) toward the head | - |
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| (noun) preceding in time | Synonyms: antecedence, antecedency, precedence, precedency, priority |
| anteroom | (noun) a large entrance or reception room or area | Synonyms: antechamber, entrance hall, foyer, hall, lobby, vestibule |
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| anthelminthic | (noun) a medication capable of causing the evacuation of parasitic intestinal worms | Synonyms: anthelmintic, helminthic, vermifuge |
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| anthelmintic | (noun) a medication capable of causing the evacuation of parasitic intestinal worms | Synonyms: anthelminthic, helminthic, vermifuge |
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| anthem | (noun) a song of praise (to God or to a saint or to a nation) | Synonyms: hymn |
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| (noun) a song of devotion or loyalty (as to a nation or school) | - |
| anther | (noun) the part of the stamen that contains pollen; usually borne on a stalk | - |
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| antheridiophore | (noun) gametophore bearing antheridia as in certain mosses and liverworts | - |
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| antheridium | (noun) the male sex organ of spore-producing plants; produces antherozoids; equivalent to the anther in flowers | - |
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| antherozoid | (noun) a motile male gamete of a plant such as an alga or fern or gymnosperm | Synonyms: spermatozoid |
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| anthesis | (noun) the time and process of budding and unfolding of blossoms | Synonyms: blossoming, efflorescence, florescence, flowering, inflorescence |
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| anthill | (noun) a mound of earth made by ants as they dig their nest | Synonyms: formicary |
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| anthologist | (noun) an editor who makes selections for an anthology | - |
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| anthology | (noun) a collection of selected literary passages | - |
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| anthophyllite | (noun) a dark brown mineral of the amphibole group; magnesium iron silicate | - |
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| anthozoan | (noun) sessile marine coelenterates including solitary and colonial polyps; the medusoid phase is entirely suppressed | Synonyms: actinozoan |
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| anthracite | (noun) a hard natural coal that burns slowly and gives intense heat | Synonyms: anthracite coal, hard coal |
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| anthracosis | (noun) lung disease caused by inhaling coal dust | Synonyms: black lung, black lung disease, coal miner's lung |
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| anthrax | (noun) a highly infectious animal disease (especially cattle and sheep); it can be transmitted to people | Synonyms: splenic fever |
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| (noun) a disease of humans that is not communicable; caused by infection with Bacillus anthracis followed by septicemia | - |
| anthropocentricity | (noun) an inclination to evaluate reality exclusively in terms of human values | Synonyms: anthropocentrism |
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| anthropocentrism | (noun) an inclination to evaluate reality exclusively in terms of human values | Synonyms: anthropocentricity |
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| anthropogenesis | (noun) the evolution or genesis of the human race | Synonyms: anthropogeny |
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| anthropogeny | (noun) the evolution or genesis of the human race | Synonyms: anthropogenesis |
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| anthropoid | (noun) any member of the suborder Anthropoidea including monkeys and apes and hominids | - |
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| (noun) person who resembles a nonhuman primate | Synonyms: ape |
| anthropolatry | (noun) the worship of human beings | Synonyms: worship of man |
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| anthropologism | (noun) a point of view in which human nature is exhaustively determined by the culture in which a person lives, leaving no room for human agency. | - |
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| anthropologist | (noun) a social scientist who specializes in anthropology | - |
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| anthropology | (noun) the social science that studies the origins and social relationships of human beings | - |
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| anthropometry | (noun) measurement and study of the human body and its parts and capacities | - |
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| anthropomorphism | (noun) the representation of objects (especially a god) as having human form or traits | Synonyms: theanthropism |
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| anthropopathism | (noun) Attribution of human feelings to things not human, such as inanimate objects, animals, or natural phenomena. | - |
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| anthropophagite | (noun) a person who eats human flesh | Synonyms: anthropophagus, cannibal, man-eater |
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| anthropophagus | (noun) a person who eats human flesh | Synonyms: anthropophagite, cannibal, man-eater |
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| anthropophagy | (noun) human cannibalism; the eating of human flesh | - |
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| anthroposophy | (noun) a system of beliefs and practices based on the philosophy of Rudolf Steiner; it claims to integrate the practical and psychological in child-centered education | - |
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| anthurium | (noun) any of various tropical American plants cultivated for their showy foliage and flowers | Synonyms: tail-flower, tailflower |
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| anti | (noun) a person who is opposed (to an action or policy or practice etc.) | - |
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| antiacid | (noun) an agent that counteracts or neutralizes acidity (especially in the stomach) | Synonyms: alkaliser, alkalizer, antacid, gastric antacid |
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| antiaircraft | (noun) artillery designed to shoot upward at airplanes | Synonyms: ack-ack, ack-ack gun, antiaircraft gun, flack, flak, pom-pom |
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| antialiasing | (noun) (computer graphics) a technique that is used to smooth jagged distortions in curves and diagonal lines so they appear smoother | - |
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| antiarrhythmic | (noun) a drug used to treat an abnormal heart rhythm | Synonyms: antiarrhythmic drug, antiarrhythmic medication |
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| antibacterial | (noun) any drug that destroys bacteria or inhibits their growth | Synonyms: antibacterial drug, bactericide |
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| antibaryon | (noun) the antiparticle of a baryon; a hadron with a baryon number of -1 | - |
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| antibiosis | (noun) an association between organisms that is harmful to one of them or between organisms and a metabolic product of another | - |
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| antibiotic | (noun) a chemical substance derivable from a mold or bacterium that can kill microorganisms and cure bacterial infections | Synonyms: antibiotic drug |
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| antibody | (noun) any of a large variety of proteins normally present in the body or produced in response to an antigen which it neutralizes, thus producing an immune response | - |
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| antic | (noun) a ludicrous or grotesque act done for fun and amusement | Synonyms: caper, joke, prank, put-on, trick |
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| anticatalyst | (noun) (chemistry) a substance that retards a chemical reaction or diminishes the activity of a catalyst | - |
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| anticholinergic | (noun) a substance that opposes or blocks the action of acetylcholine | Synonyms: anticholinergic drug |
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| anticholinesterase | (noun) a medicine that inhibits cholinesterase by combining with it and so has a cholinergic effect | - |
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| anticipant | (noun) one who anticipates | Synonyms: anticipator |
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| anticipation | (noun) the act of predicting (as by reasoning about the future) | Synonyms: prediction, prevision |
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| (noun) something expected (as on the basis of a norm) | Synonyms: expectancy |
| (noun) an expectation | Synonyms: expectancy |
| (noun) anticipating with confidence of fulfillment | Synonyms: expectation |
| anticipator | (noun) one who anticipates | Synonyms: anticipant |
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| anticlimax | (noun) a change from a serious subject to a disappointing one | Synonyms: bathos |
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| (noun) a disappointing decline after a previous rise | - |
| anticoagulant | (noun) medicine that prevents or retards the clotting of blood | Synonyms: anticoagulant medication, decoagulant |
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| anticoagulation | (noun) the administration of an anticoagulant drug to retard coagulation of the blood | - |
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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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| anticyclone | (noun) (meteorology) winds spiraling outward from a high pressure center; circling clockwise in the Northern Hemisphere and counterclockwise in the southern | - |
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| antidepressant | (noun) any of a class of drugs used to treat depression; often have undesirable side effects | Synonyms: antidepressant drug |
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| antidiabetic | (noun) a drug used to treat diabetes mellitus | Synonyms: antidiabetic drug |
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| antidiarrheal | (noun) a drug used to control or stop diarrhea | Synonyms: antidiarrheal drug |
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| antidiuretic | (noun) a drug that limits the formation of urine | Synonyms: antidiuretic drug |
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| antidote | (noun) a remedy that stops or controls the effects of a poison | Synonyms: counterpoison |
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| antielectron | (noun) an elementary particle with positive charge; interaction of a positron and an electron results in annihilation | Synonyms: positron |
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| antiemetic | (noun) a drug that prevents or alleviates nausea and vomiting | Synonyms: antiemetic drug |
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| antiepileptic | (noun) a drug used to treat or prevent convulsions (as in epilepsy) | Synonyms: anticonvulsant, anticonvulsant drug, antiepileptic drug |
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| antiestablishmentarianism | (noun) the doctrine of opposition to the social and political establishment | Synonyms: antiestablishmentism |
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| antiestablishmentism | (noun) the doctrine of opposition to the social and political establishment | Synonyms: antiestablishmentarianism |
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| antifeminism | (noun) activity indicative of belief in the superiority of men over women | Synonyms: chauvinism, male chauvinism |
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| antifeminist | (noun) someone who does not believe in the social or economic or political equality of men and women | - |
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| antiferromagnet | (noun) any material that has antiferromagnetic properties. | - |
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| antiferromagnetism | (noun) magnetic field creates parallel but opposing spins; varies with temperature | - |
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| antifertilizin | (noun) An immunologically specific substance produced by animal sperm to implement attraction by the egg before fertilization. | - |
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| antiflatulent | (noun) any agent that reduces intestinal gas | - |
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| antifreeze | (noun) a liquid added to the water in a cooling system to lower its freezing point | - |
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| antifungal | (noun) any agent that destroys or prevents the growth of fungi | Synonyms: antifungal agent, antimycotic, antimycotic agent, fungicide |
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| antigen | (noun) any substance (as a toxin or enzyme) that stimulates an immune response in the body (especially the production of antibodies) | - |
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| antigram | (noun) an anagram that means the opposite of the original word or phrase | - |
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| antihero | (noun) a protagonist who lacks the characteristics that would make him a hero (or her a heroine) | - |
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| antihistamine | (noun) a medicine used to treat allergies and hypersensitive reactions and colds; works by counteracting the effects of histamine on a receptor site | - |
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| antihypertensive | (noun) a drug that reduces high blood pressure | Synonyms: antihypertensive drug |
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