abalone | (noun) any of various large edible marine gastropods of the genus Haliotis having an ear-shaped shell with pearly interior | Synonyms: ear-shell |
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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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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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acetone | (noun) the simplest ketone; a highly flammable liquid widely used as an organic solvent and as material for making plastics | Synonyms: dimethyl ketone, propanone |
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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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acetylene | (noun) a colorless flammable gas used chiefly in welding and in organic synthesis | Synonyms: alkyne, ethyne |
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achene | (noun) small dry indehiscent fruit with the seed distinct from the fruit wall | - |
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acne | (noun) an inflammatory disease involving the sebaceous glands of the skin; characterized by papules or pustules or comedones | - |
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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 |
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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adrenosterone | (noun) a steroid having androgenic activity; obtained from the cortex of the adrenal gland | - |
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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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aeroplane | (noun) an aircraft that has a fixed wing and is powered by propellers or jets | Synonyms: airplane, plane |
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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 | - |
agone | (adjective) gone by; or in the past | Synonyms: ago |
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airborne | (adjective) moved or conveyed by or through air | - |
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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 |
airplane | (noun) an aircraft that has a fixed wing and is powered by propellers or jets | Synonyms: aeroplane, plane |
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aitchbone | (noun) a cut of beef including the H-shaped rump bone | - |
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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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aldosterone | (noun) a corticosteroid hormone that is secreted by the cortex of the adrenal gland; regulates salt (sodium and potassium) and water balance | - |
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aleurone | (noun) granular protein in outermost layer of endosperm of many seeds or cereal grains | - |
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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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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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alkane | (noun) a series of non-aromatic saturated hydrocarbons with the general formula CnH(2n+2) | Synonyms: alkane series, methane series, paraffin, paraffin series |
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alkene | (noun) any unsaturated aliphatic hydrocarbon | Synonyms: olefin, olefine |
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alkylbenzene | (noun) organic compound that has an alkyl group bound to a benzene ring | - |
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alkyne | (noun) a colorless flammable gas used chiefly in welding and in organic synthesis | Synonyms: acetylene, ethyne |
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allophone | (noun) (linguistics) any of various acoustically different forms of the same phoneme | - |
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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 |
alone | (adjective) exclusive of anyone or anything else | Synonyms: only |
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(adjective) radically distinctive and without equal | Synonyms: unequaled, unequalled, unique, unparalleled |
(adjective) lacking companions or companionship | Synonyms: lone, lonely, solitary |
(adjective) isolated from others | - |
(adverb) without any others being included or involved | Synonyms: entirely, exclusively, only, solely |
(adverb) without anybody else or anything else | Synonyms: solo, unaccompanied |
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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aminoalkane | (noun) a compound derived from ammonia by replacing hydrogen atoms by univalent hydrocarbon radicals | Synonyms: amine |
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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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aminomethane | (noun) a methyl with the hydrogen atom replaced by an amino radical | - |
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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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amiodarone | (noun) an antiarrhythmic drug (trade name Cordarone) that has potentially fatal side effects and is used to control serious heart rhythm problems only when safer agents have been ineffective | Synonyms: Cordarone |
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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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amrinone | (noun) a drug (trade name Inocor) used intravenously in heart failure; increases strength of contraction of myocardium | Synonyms: Inocor |
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amygdaline | (adjective) related to or resembling an almond | - |
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androgyne | (noun) one having both male and female sexual characteristics and organs; at birth an unambiguous assignment of male or female cannot be made | Synonyms: epicene, epicene person, gynandromorph, hermaphrodite, intersex |
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androsterone | (noun) an androgenic hormone that is less active than testosterone | - |
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ane | (adjective) used of a single unit or thing; not two or more | Synonyms: 1, i, one |
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anemone | (noun) marine polyps that resemble flowers but have oral rings of tentacles; differ from corals in forming no hard skeleton | Synonyms: sea anemone |
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(noun) any woodland plant of the genus Anemone grown for its beautiful flowers and whorls of dissected leaves | Synonyms: windflower |
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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anklebone | (noun) the bone in the ankle that articulates with the leg bones to form the ankle joint | Synonyms: astragal, astragalus, talus |
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anodyne | (adjective) capable of relieving pain | Synonyms: analgesic, analgetic |
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(noun) a medicine used to relieve pain | Synonyms: analgesic, pain pill, painkiller |
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 |
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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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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antisubmarine | (adjective) defensive against enemy submarines | - |
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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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apocrine | (adjective) (of exocrine glands) producing a secretion in which part of the secreting cell is released with the secretion | - |
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apolune | (noun) apoapsis in orbit around the moon | Synonyms: aposelene |
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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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aposelene | (noun) apoapsis in orbit around the moon | Synonyms: apolune |
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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 | - |
aquaplane | (noun) a board that is pulled by a speedboat as a person stands on it and skims over the top of the water | - |
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(verb) ride on an aquaplane | - |
(verb) rise up onto a thin film of water between the tires and road so that there is no more contact with the road | - |
aquiline | (adjective) curved down like an eagle's beak | Synonyms: hooked |
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arcane | (adjective) requiring secret or mysterious knowledge | - |
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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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argemone | (noun) any plant of the genus Argemone having large white or yellow flowers and prickly leaves and stems and pods; chiefly of tropical America | Synonyms: devil's fig, prickly poppy, white thistle |
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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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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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atone | (verb) turn away from sin or do penitence | Synonyms: repent |
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(verb) make amends for | Synonyms: aby, abye, expiate |
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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attune | (verb) adjust or accustom to; bring into harmony with | - |
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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 | - |
autoimmune | (adjective) of or relating to the immune response of the body against substance normally present in the body | - |
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avellane | (adjective) pertaining to filberts or hazelnuts | Synonyms: avellan |
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aventurine | (noun) a translucent quartz spangled with bits of mica or other minerals | Synonyms: sunstone |
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axone | (noun) long nerve fiber that conducts away from the cell body of the neuron | Synonyms: axon |
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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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backbone | (noun) the part of a network that connects other networks together | - |
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(noun) the part of a book's cover that encloses the inner side of the book's pages and that faces outward when the book is shelved | Synonyms: spine |
(noun) fortitude and determination | Synonyms: grit, gumption, guts, moxie, sand |
(noun) the series of vertebrae forming the axis of the skeleton and protecting the spinal cord | Synonyms: back, rachis, spinal column, spine, vertebral column |
(noun) a central cohesive source of support and stability | Synonyms: anchor, keystone, linchpin, lynchpin, mainstay |
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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