| abetalipoproteinemia | (noun) a rare inherited disorder of fat metabolism; characterized by severe deficiency of beta-lipoproteins and abnormal red blood cells (acanthocytes) and abnormally low cholesterol levels | - |
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| aborigine | (noun) an indigenous person who was born in a particular place | Synonyms: aboriginal, indigen, indigene, native |
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| abstainer | (noun) a person who refrains from drinking intoxicating beverages | Synonyms: abstinent, nondrinker |
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| (noun) someone who practices self denial as a spiritual discipline | Synonyms: ascetic |
| abstinence | (noun) act or practice of refraining from indulging an appetite | - |
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| (noun) the trait of abstaining (especially from alcohol) | Synonyms: abstention |
| abstinent | (adjective) self-restraining; not indulging an appetite especially for food or drink | Synonyms: abstentious |
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| (noun) a person who refrains from drinking intoxicating beverages | Synonyms: abstainer, nondrinker |
| acarine | (noun) mite or tick | - |
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| accipitrine | (adjective) of or relating to or belonging to the genus Accipiter (or to typical hawks) | - |
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| acetylcholine | (noun) a neurotransmitter that is a derivative of choline; released at the ends of nerve fibers in the somatic and parasympathetic nervous systems | - |
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| adamantine | (adjective) consisting of or having the hardness of adamant | - |
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| (adjective) having the hardness of a diamond | - |
| (adjective) impervious to pleas, persuasion, requests, reason | Synonyms: adamant, inexorable, intransigent |
| addlebrained | (adjective) stupid and confused | Synonyms: addlepated, muddleheaded, puddingheaded |
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| adenine | (noun) (biochemistry) purine base found in DNA and RNA; pairs with thymine in DNA and with uracil in RNA | Synonyms: A |
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| adenosine | (noun) (biochemistry) a nucleoside that is a structural component of nucleic acids; it is present in all living cells in a combined form as a constituent of DNA and RNA and ADP and ATP and AMP | - |
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| adrenaline | (noun) a catecholamine secreted by the adrenal medulla in response to stress (trade name Adrenalin); stimulates autonomic nerve action | Synonyms: Adrenalin, epinephrin, epinephrine |
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| adulterine | (adjective) conceived in adultery | - |
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| aeromedicine | (noun) the study and treatment of disorders associated with flight (especially with space flight) | Synonyms: aerospace medicine, aviation medicine |
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| affine | (adjective) (mathematics) of or pertaining to the geometry of affine transformations | - |
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| (adjective) (anthropology) related by marriage | Synonyms: affinal |
| (noun) (anthropology) kin by marriage | - |
| affined | (adjective) closely related | - |
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| agammaglobulinemia | (noun) a rare immunological disorder characterized by the virtual absence of gamma globulin in the blood and consequent susceptibility to infection | - |
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| agribusiness | (noun) a large-scale farming enterprise | Synonyms: agriculture, factory farm |
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| airiness | (noun) the property of something weightless and insubstantial | Synonyms: buoyancy |
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| (noun) the property of something spacious and abounding in fresh air | - |
| (noun) lightness in movement or manner | Synonyms: delicacy |
| airline | (noun) a commercial enterprise that provides scheduled flights for passengers | Synonyms: airline business, airway |
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| (noun) a hose that carries air under pressure | Synonyms: air hose |
| airliner | (noun) a commercial airplane that carries passengers | - |
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| airworthiness | (noun) fitness to fly | - |
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| akinesia | (noun) motionlessness attributable to a temporary paralysis | Synonyms: akinesis |
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| akinesis | (noun) motionlessness attributable to a temporary paralysis | Synonyms: akinesia |
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| alabastrine | (adjective) of or resembling alabaster | Synonyms: alabaster |
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| alanine | (noun) a crystalline amino acid that occurs in many proteins | - |
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| albuginea | (noun) whitish tunic | - |
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| aline | (verb) place in a line or arrange so as to be parallel or straight | Synonyms: adjust, align, line up |
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| alinement | (noun) an organization of people (or countries) involved in a pact or treaty | Synonyms: alignment, alliance, coalition |
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| alizarine | (noun) an orange-red crystalline compound used in making red pigments and in dyeing | Synonyms: alizarin |
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| alkaline | (adjective) relating to or containing an alkali; having a pH greater than 7 | Synonyms: alkalic |
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| almandine | (noun) a purple variety of the ruby spinel | - |
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| (noun) a deep red garnet consisting of iron aluminum silicate | Synonyms: almandite |
| alpestrine | (adjective) growing at high altitudes | Synonyms: subalpine |
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| alpine | (adjective) relating to or characteristic of alps | - |
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| (adjective) living or growing above the timber line | - |
| alvine | (adjective) of or relating to the intestines | - |
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| amaranthine | (adjective) of or related to the amaranth plant | - |
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| (adjective) of an imaginary flower that never fades | Synonyms: unfading |
| amethystine | (adjective) containing or resembling amethyst | - |
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| amidopyrine | (noun) a white crystalline substance used as an analgesic and antipyretic | Synonyms: aminopyrine |
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| amine | (noun) a compound derived from ammonia by replacing hydrogen atoms by univalent hydrocarbon radicals | Synonyms: aminoalkane |
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| aminobenzine | (noun) oily poisonous liquid amine obtained from nitrobenzene and used to make dyes and plastics and medicines | Synonyms: aniline, aniline oil, phenylamine |
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| aminophylline | (noun) a theophylline derivative that is used as a bronchodilator in the treatment of bronchial asthma, emphysema, and bronchitis | - |
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| aminopyrine | (noun) a white crystalline substance used as an analgesic and antipyretic | Synonyms: amidopyrine |
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| amitriptyline | (noun) a tricyclic antidepressant drug (trade name Elavil) with serious side effects; interacts with many other medications | Synonyms: amitriptyline hydrochloride, Elavil |
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| ammine | (noun) a complex inorganic compound that contains ammonia molecules | - |
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| amphetamine | (noun) a central nervous system stimulant that increases energy and decreases appetite; used to treat narcolepsy and some forms of depression | Synonyms: pep pill, speed, upper |
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| amygdaline | (adjective) related to or resembling an almond | - |
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| analbuminemia | (noun) an abnormally low level of albumin in the blood serum | - |
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| angriness | (noun) the state of being angry | Synonyms: anger |
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| anguine | (adjective) of or related to or resembling a snake | - |
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| aniline | (noun) oily poisonous liquid amine obtained from nitrobenzene and used to make dyes and plastics and medicines | Synonyms: aminobenzine, aniline oil, phenylamine |
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| anoperineal | (adjective) relating to the anus and surrounding perineum | - |
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| anopheline | (adjective) relating to or characteristic of malaria mosquitoes | - |
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| (noun) any mosquito of the genus Anopheles | - |
| anserine | (adjective) of or resembling a goose | - |
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| (adjective) having or revealing stupidity | Synonyms: dopey, dopy, foolish, gooselike, goosey, goosy, jerky |
| 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 |
| anticholinesterase | (noun) a medicine that inhibits cholinesterase by combining with it and so has a cholinergic effect | - |
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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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| 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 |
| antineutrino | (noun) the antiparticle of a neutrino | - |
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| antineutron | (noun) the antiparticle of a neutron | - |
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| antisubmarine | (adjective) defensive against enemy submarines | - |
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| 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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| 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 | - |
| 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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| 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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| 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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| 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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| ascertained | (adjective) discovered or determined by scientific observation | Synonyms: discovered, observed |
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| asinine | (adjective) extremely silly or stupid | Synonyms: fatuous, inane |
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| asparagine | (noun) a crystalline amino acid found in proteins and in many plants (e.g., asparagus) | - |
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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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| 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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| attained | (adjective) achieved or reached | - |
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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 | - |
| aventurine | (noun) a translucent quartz spangled with bits of mica or other minerals | Synonyms: sunstone |
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| azathioprine | (noun) an immunosuppressive drug (trade name Imuran) used to prevent rejection of a transplanted organ | Synonyms: Imuran |
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| balkiness | (noun) likely to stop abruptly and unexpectedly | - |
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| balkline | (noun) line across a billiard table behind which the cue balls are placed at the start of a game | Synonyms: baulk-line, string line |
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| balminess | (noun) the quality of weather that is deliciously mild and soothing | Synonyms: softness |
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| bargainer | (noun) someone who purchases and maintains an inventory of goods to be sold | Synonyms: dealer, monger, trader |
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| (noun) negotiator of the terms of a transaction | - |
| baseline | (noun) the lines a baseball player must follow while running the bases | - |
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| (noun) the back line bounding each end of a tennis or handball court; when serving the server must not step over this line | Synonyms: service line |
| (noun) an imaginary line or standard by which things are measured or compared | - |
| basined | (adjective) enclosed in a basin | - |
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| basinet | (noun) a medieval steel helmet | - |
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| bassine | (noun) coarse leaf fiber from palmyra palms used in making brushes and brooms | - |
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| bassinet | (noun) a basket (usually hooded) used as a baby's bed | - |
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| (noun) a perambulator that resembles a bassinet | - |
| bawdiness | (noun) the trait of behaving in an obscene manner | Synonyms: lewdness, obscenity, salaciousness, salacity |
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| beastliness | (noun) unpleasant nastiness; used especially of nasty weather | - |
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| (noun) the quality of being deliberately mean | Synonyms: meanness |
| beeline | (noun) the most direct route | - |
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| beguine | (noun) a ballroom dance that originated in the French West Indies; similar to the rumba | - |
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| (noun) music written in the bolero rhythm of the beguine dance | - |
| bellarmine | (noun) a stoneware drinking jug with a long neck; decorated with a caricature of Cardinal Bellarmine (17th century) | Synonyms: greybeard, long-beard, longbeard |
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| benedictine | (noun) a French liqueur originally made by Benedictine monks | - |
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| benzine | (noun) a colorless liquid hydrocarbon; highly flammable; carcinogenic; the simplest of the aromatic compounds | Synonyms: benzene, benzol |
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| benzocaine | (noun) a white crystalline ester used as a local anesthetic | Synonyms: ethyl aminobenzoate |
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