| aboriginal | (noun) an indigenous person who was born in a particular place | Synonyms: aborigine, indigen, indigene, native |
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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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| acanthopterygian | (noun) a teleost fish with fins that are supported by sharp inflexible rays | Synonyms: spiny-finned fish |
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| adagio | (noun) a slow section of a pas de deux requiring great skill and strength by the dancers | - |
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| (noun) (music) a composition played in adagio tempo (slowly and gracefully) | - |
| adelgid | (noun) any of various insects that feed and form galls on conifers | - |
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| adrenergic | (noun) drug that has the effects of epinephrine | Synonyms: adrenergic drug |
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| aegir | (noun) a high wave (often dangerous) caused by tidal flow (as by colliding tidal currents or in a narrow estuary) | Synonyms: bore, eager, eagre, tidal bore |
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| aegis | (noun) kindly endorsement and guidance | Synonyms: auspices, protection |
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| (noun) armor plate that protects the chest; the front part of a cuirass | Synonyms: breastplate, egis |
| aerodontalgia | (noun) pain in the teeth that results from a change in air pressure (as in flying or mountain climbing) | - |
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| aerophagia | (noun) swallowing air (usually followed by belching and discomfort and flatulence) | - |
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| aetiologist | (noun) a specialist in the etiology of diseases | Synonyms: etiologist |
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| agility | (noun) the gracefulness of a person or animal that is quick and nimble | Synonyms: legerity, lightness, lightsomeness, nimbleness |
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| aging | (noun) the organic process of growing older and showing the effects of increasing age | Synonyms: ageing, senescence |
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| (noun) acquiring desirable qualities by being left undisturbed for some time | Synonyms: ageing, ripening |
| agio | (noun) a fee charged for exchanging currencies | Synonyms: agiotage, exchange premium, premium |
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| agiotage | (noun) a fee charged for exchanging currencies | Synonyms: agio, exchange premium, premium |
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| (noun) speculative dealing in stock exchange securities or foreign exchange. | - |
| agism | (noun) discrimination on the basis of a person's age | Synonyms: ageism |
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| agitation | (noun) disturbance usually in protest | Synonyms: excitement, hullabaloo, turmoil, upheaval |
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| (noun) the act of agitating something; causing it to move around (usually vigorously) | - |
| (noun) the feeling of being agitated; not calm | - |
| (noun) a state of agitation or turbulent change or development | Synonyms: ferment, fermentation, tempestuousness, unrest |
| (noun) a mental state of extreme emotional disturbance | - |
| agitator | (noun) one who agitates; a political troublemaker | Synonyms: fomenter |
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| agitprop | (noun) political propaganda (especially communist propaganda) communicated via art and literature and cinema | - |
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| albuginea | (noun) whitish tunic | - |
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| algidity | (noun) prostration characterized by cold and clammy skin and low blood pressure | - |
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| algin | (noun) a gum used especially as a thickener or emulsifier | Synonyms: alginic acid |
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| allegiance | (noun) the act of binding yourself (intellectually or emotionally) to a course of action | Synonyms: commitment, dedication, loyalty |
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| (noun) the loyalty that citizens owe to their country (or subjects to their sovereign) | Synonyms: fealty |
| allergist | (noun) a physician skilled in the diagnosis and treatment of allergies | - |
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| almsgiver | (noun) a person who gives alms | - |
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| almsgiving | (noun) making voluntary contributions to aid the poor | Synonyms: alms-giving |
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| analogist | (noun) someone who looks for analogies or who reasons by analogy | - |
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| anesthesiologist | (noun) a specialist who administers an anesthetic to a patient before he is treated | Synonyms: anaesthetist, anesthetist |
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| angiitis | (noun) inflammation of a blood vessel or lymph duct | - |
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| angina | (noun) any disease of the throat or fauces marked by spasmodic attacks of intense suffocative pain | - |
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| (noun) a heart condition marked by paroxysms of chest pain due to reduced oxygen to the heart | Synonyms: angina pectoris |
| angiocardiogram | (noun) a series of X rays representing the action of the heart and its blood vessels after the injection of a radiopaque substance | - |
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| angiocarp | (noun) tree bearing fruit enclosed in a shell or involucre or husk | - |
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| angioedema | (noun) recurrent large circumscribed areas of subcutaneous edema; onset is sudden and it disappears within 24 hours; seen mainly in young women, often as an allergic reaction to food or drugs | Synonyms: atrophedema, giant hives, periodic edema, Quincke's edema |
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| angiogenesis | (noun) the formation of new blood vessels | - |
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| angiogram | (noun) an X-ray representation of blood vessels made after the injection of a radiopaque substance | - |
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| angiography | (noun) roentgenographic examination of blood vessels after injection of a radiopaque contrast medium; produces an angiogram | - |
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| angiohemophilia | (noun) a form of hemophilia discovered by Erik von Willebrand; a genetic disorder that is inherited as an autosomal recessive trait; characterized by a deficiency of the coagulation factor and by mucosal bleeding | Synonyms: vascular hemophilia, von Willebrand's disease |
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| angiologist | (noun) a physician who specializes in angiology | - |
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| angiology | (noun) the branch of medical science that studies the blood and lymph vessels and their disorders | - |
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| angioma | (noun) a tumor consisting of a mass of blood or lymphatic vessels | - |
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| angiopathy | (noun) any disease of the blood vessels or lymph ducts | - |
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| angioplasty | (noun) an operation to repair a damaged blood vessel or unblock a coronary artery | - |
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| angiopteris | (noun) highly variable species of very large primitive ferns of the Pacific tropical areas with high rainfall | Synonyms: Angiopteris evecta, giant fern |
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| angiosarcoma | (noun) a rare malignant neoplasm arising from vascular tissue; usually occurs in the breast and skin and is believed to originate from the endothelial cells of blood vessels | - |
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| angioscope | (noun) a modified microscope used to study capillary vessels | - |
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| angiosperm | (noun) plants having seeds in a closed ovary | Synonyms: flowering plant |
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| angiotelectasia | (noun) dilation and enlargement of arterioles | - |
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| angiotensin | (noun) any of several vasoconstrictor substances (trade name Hypertensin) that cause narrowing of blood vessels | Synonyms: angiotonin, Hypertensin |
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| angiotonin | (noun) any of several vasoconstrictor substances (trade name Hypertensin) that cause narrowing of blood vessels | Synonyms: angiotensin, Hypertensin |
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| anthologist | (noun) an editor who makes selections for an anthology | - |
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| anthropologism | (noun) a point of view in which human nature is exhaustively determined by the culture in which a person lives, leaving no room for human agency. | - |
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| anthropologist | (noun) a social scientist who specializes in anthropology | - |
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| anthropophagite | (noun) a person who eats human flesh | Synonyms: anthropophagus, cannibal, man-eater |
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| anticholinergic | (noun) a substance that opposes or blocks the action of acetylcholine | Synonyms: anticholinergic drug |
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| antilogism | (noun) an inconsistent triad of propositions in logic of which two are premises of a valid syllogism while the third is the contradictory of its conclusion. | - |
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| antireligiousness | (noun) The state or condition of being opposed to religion. | - |
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| aphagia | (noun) loss of the ability to swallow | - |
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| apologia | (noun) a formal written defense of something you believe in strongly | Synonyms: apology |
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| apologist | (noun) a person who argues to defend or justify some policy or institution | Synonyms: justifier, vindicator |
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| appoggiatura | (noun) an embellishing note usually written in smaller size | Synonyms: acciaccatura, grace note |
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| aquilegia | (noun) a plant of the genus Aquilegia having irregular showy spurred flowers; north temperate regions especially mountains | Synonyms: aquilege, columbine |
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| archaeologist | (noun) an anthropologist who studies prehistoric people and their culture | Synonyms: archeologist |
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| archeologist | (noun) an anthropologist who studies prehistoric people and their culture | Synonyms: archaeologist |
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| argil | (noun) a white clay (especially a white clay used by potters) | - |
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| argillite | (noun) a sedimentary rock differing from shale in being bound by silica and from slate in having no slate cleavages | - |
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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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| arpeggio | (noun) a chord whose notes are played in rapid succession rather than simultaneously | - |
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| arranging | (noun) the act of arranging and adapting a piece of music | Synonyms: arrangement, transcription |
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| arthralgia | (noun) pain in a joint or joints | - |
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| asparaginase | (noun) antineoplastic drug (trade name Elspar) sometimes used to treat lymphoblastic leukemia | Synonyms: Elspar |
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| asparagine | (noun) a crystalline amino acid found in proteins and in many plants (e.g., asparagus) | - |
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| aspergill | (noun) a short-handled device with a globe containing a sponge; used for sprinkling holy water | Synonyms: aspersorium |
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| aspergillosis | (noun) an opportunistic infection by a fungus of the genus Aspergillus; characterized by inflammation and lesions of the ear and other organs | - |
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| (noun) disease especially in agricultural workers caused by inhalation of Aspergillus spores causing lumps in skin and ears and respiratory organs | - |
| (noun) severe respiratory disease of birds that takes the form of an acute rapidly fatal pneumonia in young chickens and turkeys | Synonyms: brooder pneumonia |
| astrologist | (noun) someone who predicts the future by the positions of the planets and sun and Moon | Synonyms: astrologer |
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| asynergia | (noun) absence of coordination of organs or body parts that usually work together harmoniously | Synonyms: asynergy |
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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 |
| augite | (noun) dark-green to black glassy mineral of the pyroxene group containing large amounts of aluminum and iron and magnesium | - |
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| autogiro | (noun) an aircraft that is supported in flight by unpowered rotating horizontal wings (or blades); forward propulsion is provided by a conventional propeller | Synonyms: autogyro, gyroplane |
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| bacteriologist | (noun) a biologist who studies bacteria | - |
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| bagging | (noun) coarse fabric used for bags or sacks | Synonyms: sacking |
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| bandaging | (noun) the act of applying a bandage | Synonyms: binding, dressing |
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| banging | (noun) the act of subjecting to strong attack | Synonyms: battering |
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| (noun) a continuing very loud noise | - |
| begging | (noun) a solicitation for money or food (especially in the street by an apparently penniless person) | Synonyms: beggary, mendicancy |
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| beginner | (noun) someone new to a field or activity | Synonyms: initiate, novice, tiro, tyro |
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| (noun) a person who founds or establishes some institution | Synonyms: father, founder, founding father |
| beginning | (noun) the act of starting something | Synonyms: commencement, start |
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| (noun) the first part or section of something | - |
| (noun) the event consisting of the start of something | - |
| (noun) the place where something begins, where it springs into being | Synonyms: origin, root, rootage, source |
| (noun) the time at which something is supposed to begin | Synonyms: commencement, first, get-go, kickoff, offset, outset, showtime, start, starting time |
| belonging | (noun) happiness felt in a secure relationship | - |
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| belongings | (noun) something owned; any tangible or intangible possession that is owned by someone | Synonyms: holding, property |
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| besieging | (noun) the action of an armed force that surrounds a fortified place and isolates it while continuing to attack | Synonyms: beleaguering, military blockade, siege |
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| biggin | (noun) a child's tight-fitting cap; often ties under the chin | - |
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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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| biologism | (noun) use of biological principles in explaining human especially social behavior | - |
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| biologist | (noun) (biology) a scientist who studies living organisms | Synonyms: life scientist |
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| bluegill | (noun) important edible sunfish of eastern and central United States | Synonyms: Lepomis macrochirus |
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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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| bogie | (noun) an unidentified (and possibly enemy) aircraft | Synonyms: bogey, bogy |
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| (noun) a bogle or goblin; where used as a proper name, the Devil | Synonyms: bogey, bogy |
| boogie | (noun) an instrumental version of the blues (especially for piano) | Synonyms: boogie-woogie |
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| bootlegging | (noun) the act of making or transporting alcoholic liquor for sale illegally | - |
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| (noun) the act of selling illegally or without permission | - |
| bragging | (noun) an instance of boastful talk | Synonyms: brag, crow, crowing, gasconade, line-shooting, vaporing |
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| bringing | (noun) the act of delivering or distributing something (as goods or mail) | Synonyms: delivery |
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| budgie | (noun) small Australian parakeet usually light green with black and yellow markings in the wild but bred in many colors | Synonyms: budgereegah, budgerigar, budgerygah, grass parakeet, lovebird, Melopsittacus undulatus, shell parakeet |
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