| anisometropic | (adjective) relating to a difference in the refractive power of the two eyes | - |
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| anisotropic | (adjective) not invariant with respect to direction | - |
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| ankylotic | (adjective) relating to or characteristic of the abnormality ankylosis | - |
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| annalistic | (adjective) relating to annals | - |
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| anodic | (adjective) of or at or relating to an anode | Synonyms: anodal |
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| anomic | (adjective) socially disoriented | Synonyms: alienated, disoriented |
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| anorectic | (adjective) causing loss of appetite | Synonyms: anorexigenic |
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| (adjective) suffering from anorexia nervosa; pathologically thin | Synonyms: anorexic |
| (noun) a person suffering from anorexia nervosa | Synonyms: anorexic |
| anorexic | (adjective) suffering from anorexia nervosa; pathologically thin | Synonyms: anorectic |
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| (noun) a person suffering from anorexia nervosa | Synonyms: anorectic |
| anorexigenic | (adjective) causing loss of appetite | Synonyms: anorectic |
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| anorthic | (adjective) having three unequal crystal axes intersecting at oblique angles | Synonyms: triclinic |
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| anorthitic | (adjective) characteristic of anorthite | - |
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| anosmatic | (adjective) relating to an impairment or loss of the sense of smell | Synonyms: anosmic |
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| anosmic | (adjective) relating to an impairment or loss of the sense of smell | Synonyms: anosmatic |
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| (adjective) having impaired sense of smell | - |
| anoxemic | (adjective) relating to or marked by abnormally little oxygen in arterial blood | - |
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| anoxic | (adjective) relating to or marked by a severe deficiency of oxygen in tissues or organs | - |
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| antagonistic | (adjective) arousing animosity or hostility | - |
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| (adjective) used especially of drugs or muscles that counteract or neutralize each other's effect | Synonyms: incompatible |
| (adjective) characterized by antagonism or antipathy | Synonyms: antipathetic, antipathetical |
| (adjective) incapable of harmonious association | - |
| (adjective) indicating opposition or resistance | Synonyms: counter |
| anthelminthic | (adjective) capable of expelling or destroying parasitic worms | Synonyms: anthelmintic, helminthic, parasiticidal |
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| (noun) a medication capable of causing the evacuation of parasitic intestinal worms | Synonyms: anthelmintic, helminthic, vermifuge |
| anthelmintic | (adjective) capable of expelling or destroying parasitic worms | Synonyms: anthelminthic, helminthic, parasiticidal |
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| (noun) a medication capable of causing the evacuation of parasitic intestinal worms | Synonyms: anthelminthic, helminthic, vermifuge |
| anthracitic | (adjective) relating to or resembling anthracite coal | - |
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| anthropic | (adjective) relating to mankind or the period of mankind's existence | Synonyms: anthropical |
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| anthropocentric | (adjective) human-centered | - |
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| anthropogenetic | (adjective) of or relating to the study of the origins and development of human beings | Synonyms: anthropogenic |
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| anthropogenic | (adjective) of or relating to the study of the origins and development of human beings | Synonyms: anthropogenetic |
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| anthropometric | (adjective) of or relating to anthropometry | Synonyms: anthropometrical |
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| anthropomorphic | (adjective) suggesting human characteristics for animals or inanimate things | Synonyms: anthropomorphous, humanlike |
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| antiadrenergic | (adjective) relating to blocking or reducing adrenergic effects in the body | - |
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| antiarrhythmic | (noun) a drug used to treat an abnormal heart rhythm | Synonyms: antiarrhythmic drug, antiarrhythmic medication |
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| antibiotic | (adjective) of or relating to antibiotic drugs | - |
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| (noun) a chemical substance derivable from a mold or bacterium that can kill microorganisms and cure bacterial infections | Synonyms: antibiotic drug |
| antic | (adjective) ludicrously odd | Synonyms: fantastic, fantastical, grotesque |
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| (noun) a ludicrous or grotesque act done for fun and amusement | Synonyms: caper, joke, prank, put-on, trick |
| (verb) act as or like a clown | Synonyms: clown, clown around |
| anticholinergic | (adjective) inhibiting or blocking the action of acetylcholine at a receptor site | - |
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| (noun) a substance that opposes or blocks the action of acetylcholine | Synonyms: anticholinergic drug |
| anticlimactic | (adjective) coming after the climax especially of a dramatic or narrative plot | - |
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| (adjective) of or relating to a sudden change from an impressive to a ludicrous style | Synonyms: anticlimactical |
| anticyclonic | (adjective) of or relating to or characteristic of the atmosphere around a high pressure center | - |
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| antidiabetic | (noun) a drug used to treat diabetes mellitus | Synonyms: antidiabetic drug |
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| antidiuretic | (noun) a drug that limits the formation of urine | Synonyms: antidiuretic drug |
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| antidromic | (adjective) conducting nerve impulses in a direction opposite to normal | - |
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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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| antiferromagnetic | (adjective) relating to antiferromagnetism | - |
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| antigenic | (adjective) of or relating to antigens | - |
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| antimagnetic | (adjective) impervious to the effects of a magnetic field; resistant to magnetization | - |
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| antimicrobic | (adjective) capable of destroying or inhibiting the growth of disease-causing microorganisms | Synonyms: antimicrobial |
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| (noun) an agent (as heat or radiation or a chemical) that destroys microorganisms that might carry disease | Synonyms: antimicrobial, disinfectant, germicide |
| antimonic | (adjective) relating to or derived from antimony | Synonyms: antimonious |
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| antimycotic | (noun) any agent that destroys or prevents the growth of fungi | Synonyms: antifungal, antifungal agent, antimycotic agent, fungicide |
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| antineoplastic | (adjective) used in the treatment of cancer | Synonyms: anticancer, antitumor, antitumour |
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| (noun) any of several drugs that control or kill neoplastic cells; used in chemotherapy to kill cancer cells; all have unpleasant side effects that may include nausea and vomiting and hair loss and suppression of bone marrow function | Synonyms: antineoplastic drug, cancer drug |
| antipathetic | (adjective) (usually followed by `to') strongly opposed | Synonyms: antipathetical, averse, indisposed, loath, loth |
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| (adjective) characterized by antagonism or antipathy | Synonyms: antagonistic, antipathetical |
| antiphlogistic | (adjective) counteracting inflammation | - |
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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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| antipyretic | (adjective) preventing or alleviating fever | - |
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| (noun) any medicine that lowers body temperature to prevent or alleviate fever | Synonyms: febrifuge |
| antisemitic | (adjective) relating to or characterized by anti-Semitism; hating Jews | Synonyms: anti-semitic |
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| 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 | - |
| antispasmodic | (noun) a drug used to relieve or prevent spasms (especially of the smooth muscles) | Synonyms: antispasmodic agent, spasmolytic |
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| antistrophic | (adjective) of or relating to an antistrophe | - |
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| antisyphilitic | (noun) a drug (or other chemical agent) that is effective against syphilis | - |
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| antithetic | (adjective) sharply contrasted in character or purpose | Synonyms: antithetical |
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| antitoxic | (adjective) counteracting a toxin or poison | - |
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| 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 |
| anuretic | (adjective) of or relating to an inability to urinate | Synonyms: anuric |
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| anuric | (adjective) of or relating to an inability to urinate | Synonyms: anuretic |
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| anxiolytic | (adjective) anxiety relieving | - |
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| (noun) a tranquilizer used to relieve anxiety and reduce tension and irritability | Synonyms: antianxiety drug, anxiolytic drug, minor tranquilizer, minor tranquilliser, minor tranquillizer |
| aoristic | (adjective) of or relating to the aorist tense | - |
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| aortic | (adjective) of or relating to the aorta | Synonyms: aortal |
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| apathetic | (adjective) showing little or no emotion or animation | - |
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| (adjective) marked by a lack of interest | Synonyms: indifferent |
| aperiodic | (adjective) not recurring at regular intervals | Synonyms: nonperiodic |
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| aphaeretic | (adjective) relating to or formed by or consisting of aphaeresis | Synonyms: apheretic |
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| aphakic | (adjective) of or relating to or afflicted with aphakia | - |
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| (noun) someone afflicted by aphakia; someone lacking the natural lenses of the eyes | - |
| aphanitic | (adjective) of or relating to aphanite | - |
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| aphasic | (adjective) related to or affected by aphasia | - |
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| (adjective) unable to speak because of a brain lesion | - |
| (noun) someone affected by aphasia or inability to use or understand language | - |
| apheretic | (adjective) relating to or formed by or consisting of aphaeresis | Synonyms: aphaeretic |
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| aphetic | (adjective) produced by aphesis | - |
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| aphonic | (adjective) being without sound through injury or illness and thus incapable of all but whispered speech | Synonyms: voiceless |
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| aphoristic | (adjective) containing aphorisms or maxims | Synonyms: axiomatic |
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| (adjective) terse and witty and like a maxim | Synonyms: apothegmatic, epigrammatic |
| aphotic | (adjective) lacking light; especially not reached by sunlight | - |
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| aplanatic | (adjective) free from or corrected for spherical aberration | - |
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| aplitic | (adjective) of or related to aplite | - |
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| apneic | (adjective) of or relating to apnea | Synonyms: apnoeic |
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| apnoeic | (adjective) of or relating to apnea | Synonyms: apneic |
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| apocalyptic | (adjective) of or relating to an apocalypse | - |
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| (adjective) prophetic of devastation or ultimate doom | Synonyms: apocalyptical, revelatory |
| apochromatic | (adjective) corrected for both chromatic and spherical aberration | - |
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| apodeictic | (adjective) of a proposition; necessarily true or logically certain | Synonyms: apodictic |
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| apodictic | (adjective) of a proposition; necessarily true or logically certain | Synonyms: apodeictic |
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| apogametic | (adjective) of or relating to the development of an embryo in the absence of fertilization | Synonyms: apogamic, apogamous |
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| apogamic | (adjective) of or relating to the development of an embryo in the absence of fertilization | Synonyms: apogametic, apogamous |
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| apologetic | (adjective) offering or expressing apology | Synonyms: excusatory |
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| apomictic | (adjective) of or relating to a plant that reproduces by apomixis | Synonyms: apomictical |
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| (adjective) (of reproduction) not involving the fusion of male and female gametes in reproduction | Synonyms: agamic, agamogenetic, agamous, parthenogenetic |
| aponeurotic | (adjective) of or relating to an aponeurosis | - |
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| apopemptic | (adjective) addressed to one who is departing | - |
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| apophatic | (adjective) of or relating to the belief that God can be known to humans only in terms of what He is not (such as `God is unknowable') | - |
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| apoplectic | (adjective) pertaining to or characteristic of apoplexy | - |
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| aposiopetic | (adjective) relating to or characteristic of aposiopesis | - |
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| apostolic | (adjective) of or relating to or deriving from the Apostles or their teachings | Synonyms: apostolical |
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| (adjective) proceeding from or ordered by or subject to a pope or the papacy regarded as the successor of the Apostles | Synonyms: apostolical, papal, pontifical |
| apostrophic | (adjective) of or characteristic of apostrophe | - |
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| apothegmatic | (adjective) given to or characterized by terse apothegms | Synonyms: apothegmatical |
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| (adjective) terse and witty and like a maxim | Synonyms: aphoristic, epigrammatic |
| apotropaic | (adjective) having the power to prevent evil or bad luck | - |
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| apractic | (adjective) having uncoordinated muscular movements, symptomatic of a CNS disorder | Synonyms: apraxic |
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| apraxic | (adjective) having uncoordinated muscular movements, symptomatic of a CNS disorder | Synonyms: apractic |
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| aquaphobic | (adjective) abnormally afraid of water | Synonyms: hydrophobic |
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| aquatic | (adjective) operating or living or growing in water | - |
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| (adjective) relating to or consisting of or being in water | - |
| (noun) a plant that lives in or on water | - |
| archaeologic | (adjective) related to or dealing with or devoted to archaeology | Synonyms: archaeological, archeologic, archeological |
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| archaeozoic | (adjective) of or belonging to earlier of two divisions of the Precambrian era | Synonyms: archeozoic |
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