| antiperspirant | (noun) an astringent substance applied to the skin to reduce perspiration | - |
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| antiphlogistic | (adjective) counteracting inflammation | - |
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| antiphon | (noun) a verse or song to be chanted or sung in response | Synonyms: antiphony |
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| antiphonal | (adjective) containing or using responses; alternating | Synonyms: responsive |
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| (adjective) relating to or resembling an antiphon or antiphony | Synonyms: antiphonary |
| (noun) bound collection of antiphons | Synonyms: antiphonary |
| antiphonary | (adjective) relating to or resembling an antiphon or antiphony | Synonyms: antiphonal |
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| (noun) bound collection of antiphons | Synonyms: antiphonal |
| 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 | (adjective) relating to the antipodes or situated at opposite sides of the earth | Synonyms: antipodean |
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| (noun) the relation of opposition along a diameter | Synonyms: antipodal opposition, diametrical opposition |
| antipode | (noun) direct opposite | - |
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| antipodean | (adjective) relating to the antipodes or situated at opposite sides of the earth | Synonyms: antipodal |
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| antipodes | (noun) any two places or regions on diametrically opposite sides of the Earth | - |
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| antipollution | (adjective) intended to reduce pollution | - |
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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 | (adjective) preventing or alleviating fever | - |
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| (noun) any medicine that lowers body temperature to prevent or alleviate fever | Synonyms: febrifuge |
| antiquarian | (adjective) of or relating to antiques or antiquities | - |
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| (adjective) of or relating to persons who study or deal in antiques or antiquities | - |
| (noun) an expert or collector of antiquities | Synonyms: antiquary, archaist |
| antiquark | (noun) the antiparticle of a quark | - |
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| antiquary | (noun) an expert or collector of antiquities | Synonyms: antiquarian, archaist |
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| antiquate | (verb) give an antique appearance to | Synonyms: antique |
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| (verb) make obsolete or old-fashioned | - |
| antiquated | (adjective) so extremely old as seeming to belong to an earlier period | Synonyms: antediluvian, archaic |
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| antiquatedness | (noun) The state or quality of being outmoded or discredited by reason of age, of being out of style or fashion. | - |
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| antique | (adjective) made in or typical of earlier times and valued for its age | - |
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| (adjective) out of fashion | Synonyms: demode, ex, old-fashioned, old-hat, outmoded, passe, passee |
| (adjective) belonging to or lasting from times long ago | Synonyms: age-old |
| (noun) any piece of furniture or decorative object or the like produced in a former period and valuable because of its beauty or rarity | - |
| (noun) an elderly man | Synonyms: gaffer, old-timer, old geezer, oldtimer |
| (verb) give an antique appearance to | Synonyms: antiquate |
| (verb) shop for antiques | - |
| antiqueness | (noun) the quality or state of being in the style or fashion of former times. | - |
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| antiquity | (noun) an artifact surviving from the past | - |
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| (noun) extreme oldness | Synonyms: ancientness |
| (noun) the historic period preceding the Middle Ages in Europe | - |
| antiredeposition | (noun) the process of preventing redeposition | - |
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| antireligiousness | (noun) The state or condition of being opposed to religion. | - |
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| antisatellite | (adjective) of or relating to a system to destroy satellites in orbit | Synonyms: ASAT |
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| antisemitic | (adjective) relating to or characterized by anti-Semitism; hating Jews | Synonyms: anti-semitic |
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| antisemitism | (noun) the intense dislike for and prejudice against Jewish people | Synonyms: anti-Semitism |
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| antisepsis | (noun) the process of inhibiting the growth and multiplication of microorganisms | Synonyms: asepsis |
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| (noun) (of non-living objects) the state of being free of pathogenic organisms | Synonyms: asepsis, sterileness, sterility |
| antiseptic | (adjective) thoroughly clean and free of or destructive to disease-causing organisms | - |
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| (adjective) devoid of objectionable language | - |
| (adjective) clean and honest | - |
| (adjective) freeing from error or corruption | - |
| (noun) a substance that destroys micro-organisms that carry disease without harming body tissues | - |
| antisepticize | (verb) disinfect with an antiseptic | - |
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| antiserum | (noun) blood serum containing antibodies against specific antigens; provides immunity to a disease | - |
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| antisocial | (adjective) shunning contact with others | - |
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| (adjective) hostile to or disruptive of normal standards of social behavior | Synonyms: asocial |
| antispasmodic | (noun) a drug used to relieve or prevent spasms (especially of the smooth muscles) | Synonyms: antispasmodic agent, spasmolytic |
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| antistrophe | (noun) the section of a choral ode answering a previous strophe in classical Greek drama; the second of two metrically corresponding sections in a poem | - |
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| antistrophic | (adjective) of or relating to an antistrophe | - |
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| antisubmarine | (adjective) defensive against enemy submarines | - |
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| antisyphilitic | (noun) a drug (or other chemical agent) that is effective against syphilis | - |
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| antitank | (adjective) designed for defense against armored vehicles | - |
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| antitauon | (noun) an antilepton of very great mass | Synonyms: tau-plus particle |
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| antithesis | (noun) the juxtaposition of contrasting words or ideas to give a feeling of balance | - |
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| (noun) exact opposite | - |
| antithetic | (adjective) sharply contrasted in character or purpose | Synonyms: antithetical |
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| antithetical | (adjective) sharply contrasted in character or purpose | Synonyms: antithetic |
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| antithetically | (adverb) with antithesis; in an antithetical manner | - |
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| antithyroid | (adjective) having the effect of counteracting excessive thyroid activity | - |
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| antitoxic | (adjective) counteracting a toxin or poison | - |
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| antitoxin | (noun) an antibody that can neutralize a specific toxin | - |
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| antitrade | (noun) winds blowing from west to east and lying above the trade winds in the tropics | Synonyms: antitrade wind |
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| antitrades | (noun) wind in the upper atmosphere blowing above but in the opposite direction from the trade winds | - |
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| antitrust | (adjective) of laws and regulations; designed to protect trade and commerce from unfair business practices | Synonyms: antimonopoly |
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| antitumor | (adjective) used in the treatment of cancer | Synonyms: anticancer, antineoplastic, antitumour |
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| antitumour | (adjective) used in the treatment of cancer | Synonyms: anticancer, antineoplastic, antitumor |
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| antitussive | (noun) any medicine used to suppress or relieve coughing | - |
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| antitype | (noun) a person or thing represented or foreshadowed by an earlier type or symbol; especially a figure or event in the New Testament having a counterpart in the Old Testament | - |
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| (noun) an opposite or contrasting type | - |
| antitypic | (adjective) of or relating to an antitype that is a symbol | Synonyms: antitypical |
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| (adjective) of or relating to an antitype that represents an opposite | Synonyms: antitypical |
| antitypical | (adjective) of or relating to an antitype that is a symbol | Synonyms: antitypic |
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| (adjective) of or relating to an antitype that represents an opposite | Synonyms: antitypic |
| 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 |
| antler | (noun) deciduous horn of a member of the deer family | - |
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| antlered | (adjective) having antlers | - |
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| antlion | (noun) winged insect resembling a dragonfly; the larvae (doodlebugs) dig conical pits where they wait to catch e.g. ants | Synonyms: ant lion, antlion fly |
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| (noun) the larva of any of several insects | Synonyms: ant lion, doodlebug |
| antonym | (noun) a word that expresses a meaning opposed to the meaning of another word, in which case the two words are antonyms of each other | Synonyms: opposite, opposite word |
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| antonymous | (adjective) of words: having opposite meanings | - |
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| antonymy | (noun) the semantic relation that holds between two words that can (in a given context) express opposite meanings | - |
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| antrorse | (adjective) bent or curved forward or upward | - |
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| antrum | (noun) a natural cavity or hollow in a bone | - |
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| antsy | (adjective) nervous and unable to relax | Synonyms: fidgety, fretful, itchy, restless |
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