| 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 | (noun) a person who refrains from drinking intoxicating beverages | Synonyms: abstainer, nondrinker |
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| acarine | (noun) mite or tick | - |
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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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| 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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| 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 | (noun) (anthropology) kin by marriage | - |
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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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| alanine | (noun) a crystalline amino acid that occurs in many proteins | - |
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| albuginea | (noun) whitish tunic | - |
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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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| 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 |
| 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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| 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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| 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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| anopheline | (noun) any mosquito of the genus Anopheles | - |
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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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| 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 | (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 |
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| antineutrino | (noun) the antiparticle of a neutrino | - |
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| antineutron | (noun) the antiparticle of a neutron | - |
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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 | - |
| 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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| 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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| 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 | (noun) any of several extinct humanlike bipedal primates with relatively small brains of the genus Australopithecus; from 1 to 4 million years ago | - |
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| 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 | - |
| 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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| benzodiazepine | (noun) any of several similar lipophilic amines used as tranquilizers or sedatives or hypnotics or muscle relaxants; chronic use can lead to dependency | - |
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| betaine | (noun) a sweet tasting alkaloid that occurs in sugar beets | - |
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| bine | (noun) European twining plant whose flowers are used chiefly to flavor malt liquors; cultivated in America | Synonyms: common hop, common hops, European hop, Humulus lupulus |
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| bioengineering | (noun) the branch of engineering science in which biological science is used to study the relation between workers and their environments | Synonyms: biotechnology, ergonomics |
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| bioluminescence | (noun) luminescence produced by physiological processes (as in the firefly) | - |
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| biomedicine | (noun) the branch of medical science that studies the ability of organisms to withstand environmental stress (as in space travel) | - |
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| (noun) the branch of medical science that applies biological and physiological principles to clinical practice | - |
| bitchiness | (noun) malevolence by virtue of being malicious or spiteful or nasty | Synonyms: cattiness, nastiness, spite, spitefulness |
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| blameworthiness | (noun) a state of guilt | Synonyms: culpability, culpableness |
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| bloodiness | (noun) a disposition to shed blood | Synonyms: bloodthirstiness |
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| (noun) the state of being bloody | - |
| bloodline | (noun) ancestry of a purebred animal | Synonyms: pedigree |
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| (noun) the hereditary derivation of an individual | Synonyms: ancestry, blood, blood line, descent, line, line of descent, lineage, origin, parentage, pedigree, stemma, stock |
| bloodthirstiness | (noun) a disposition to shed blood | Synonyms: bloodiness |
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| blurriness | (noun) the quality of being indistinct and without sharp outlines | Synonyms: fogginess, fuzziness, indistinctness, softness |
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| bogginess | (noun) The state or quality of being too wet and muddy to be easily walked on. | - |
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| bombazine | (noun) a twilled fabric used for dresses; the warp is silk and the weft is worsted | - |
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| boniness | (noun) extreme leanness (usually caused by starvation or disease) | Synonyms: bonyness, emaciation, gauntness, maceration |
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| borderline | (noun) a line that indicates a boundary | Synonyms: border, boundary line, delimitation, mete |
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| bounciness | (noun) the quality of a substance that is able to rebound | Synonyms: bounce |
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| bovine | (noun) any of various members of the genus Bos | - |
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| bowline | (noun) a loop knot that neither slips nor jams | Synonyms: bowline knot |
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| brattiness | (noun) The state or condition of acting like a brat, being unruly and impolite. | - |
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| brawniness | (noun) possessing muscular strength | Synonyms: brawn, heftiness, muscle, muscularity, sinew |
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| breadline | (noun) a queue of people waiting for free food | Synonyms: bread line |
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| breeziness | (noun) a breezy liveliness | Synonyms: jauntiness |
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| (noun) a mildly windy state of the air | Synonyms: windiness |
| brigandine | (noun) a medieval coat of chain mail consisting of metal rings sewn onto leather or cloth | - |
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