| autoantibody | (noun) an antibody acting against tissues of the organism that produces it | - |
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| autobahn | (noun) an expressway in a German-speaking country | - |
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| autobiographer | (noun) someone who writes their own biography | - |
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| autobiography | (noun) a biography of yourself | - |
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| autobus | (noun) a vehicle carrying many passengers; used for public transport | Synonyms: bus, charabanc, coach, double-decker, jitney, motorbus, motorcoach, omnibus, passenger vehicle |
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| autocatalysis | (noun) catalysis in which the catalyst is one of the products of the reaction | - |
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| autochthon | (noun) the earliest known inhabitants of a region | - |
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| autochthony | (noun) nativeness by virtue of originating or occurring naturally (as in a particular place) | Synonyms: endemism, indigenousness |
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| autoclave | (noun) a device for heating substances above their boiling point; used to manufacture chemicals or to sterilize surgical instruments | Synonyms: steriliser, sterilizer |
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| autocoid | (noun) any physiologically active internal secretion especially one of uncertain classification | Synonyms: autacoid |
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| autocorrect | (noun) a system for automatically correcting text | - |
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| autocracy | (noun) a political theory favoring unlimited authority by a single individual | - |
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| (noun) a political system governed by a single individual | Synonyms: autarchy |
| autocrat | (noun) a cruel and oppressive dictator | Synonyms: despot, tyrant |
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| autocue | (noun) a device that displays words for people to read | Synonyms: prompter |
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| autodidact | (noun) a person who has taught himself | - |
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| autoeroticism | (noun) using your own body as a sexual object | Synonyms: autoerotism |
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| autoerotism | (noun) using your own body as a sexual object | Synonyms: autoeroticism |
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| autofluorescence | (noun) self-induced fluorescence | - |
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| autofocus | (noun) an optical device for focussing a camera or other instrument automatically | - |
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| autogamy | (noun) self-fertilization in plants | - |
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| autogenesis | (noun) a hypothetical organic phenomenon by which living organisms are created from nonliving matter | Synonyms: abiogenesis, autogeny, spontaneous generation |
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| autogenics | (noun) training patients in self-induced relaxation | Synonyms: autogenic therapy, autogenic training |
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| autogeny | (noun) a hypothetical organic phenomenon by which living organisms are created from nonliving matter | Synonyms: abiogenesis, autogenesis, spontaneous generation |
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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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| autograft | (noun) tissue that is taken from one site and grafted to another site on the same person | Synonyms: autoplasty |
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| autograph | (noun) something written by one's own hand | - |
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| (noun) a person's own signature | Synonyms: John Hancock |
| autogyro | (noun) an aircraft that is supported in flight by unpowered rotating horizontal wings (or blades); forward propulsion is provided by a conventional propeller | Synonyms: autogiro, gyroplane |
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| autoimmunity | (noun) production of antibodies against the tissues of your own body; produces autoimmune disease or hypersensitivity reactions | - |
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| autoinjector | (noun) a hypodermic syringe to use in injecting yourself with a liquid | - |
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| autolatry | (noun) the worship of yourself | Synonyms: idiolatry, self-worship |
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| autoloader | (noun) a firearm that reloads itself | Synonyms: self-loader |
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| autolysis | (noun) lysis of plant or animal tissue by an internal process | Synonyms: self-digestion |
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| automaker | (noun) a business engaged in the manufacture of automobiles | Synonyms: auto maker, auto manufacturer, car maker, car manufacturer, carmaker |
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| automat | (noun) a cafeteria where food is served from machines | - |
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| (noun) a vending machine from which you can get food | - |
| automatic | (noun) self-loading rifle capable of automatic fire | Synonyms: automatic rifle, machine rifle |
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| (noun) a pistol that will keep firing until the ammunition is gone or the trigger is released | Synonyms: automatic pistol |
| automation | (noun) the act of implementing the control of equipment with advanced technology; usually involving electronic hardware | Synonyms: mechanisation, mechanization |
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| (noun) equipment used to achieve automatic control or operation | - |
| (noun) the condition of being automatically operated or controlled | - |
| automatism | (noun) any reaction that occurs automatically without conscious thought or reflection (especially the undirected behavior seen in psychomotor epilepsy) | - |
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| automaton | (noun) a mechanism that can move automatically | Synonyms: golem, robot |
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| (noun) a machine that operates on its own without the need for human control | - |
| (noun) someone who acts or responds in a mechanical or apathetic way | Synonyms: zombi, zombie |
| automobile | (noun) a motor vehicle with four wheels; usually propelled by an internal combustion engine | Synonyms: auto, car, machine, motorcar |
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| automobilist | (noun) someone who drives (or travels in) an automobile | Synonyms: motorist |
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| automysophobia | (noun) a morbid fear of being dirty | - |
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| autonomy | (noun) immunity from arbitrary exercise of authority: political independence | Synonyms: liberty |
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| (noun) personal independence | Synonyms: self-direction, self-reliance, self-sufficiency |
| autophyte | (noun) plant capable of synthesizing its own food from simple organic substances | Synonyms: autophytic plant, autotroph, autotrophic organism |
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| autopilot | (noun) a navigational device that automatically keeps ships or planes or spacecraft on a steady course | Synonyms: automatic pilot, robot pilot |
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| (noun) a cognitive state in which you act without self-awareness | Synonyms: automatic pilot |
| autoplasty | (noun) surgical repair by using tissue from another part of the patient's own body | - |
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| (noun) tissue that is taken from one site and grafted to another site on the same person | Synonyms: autograft |
| autopsy | (noun) an examination and dissection of a dead body to determine cause of death or the changes produced by disease | Synonyms: necropsy, PM, post-mortem, post-mortem examination, postmortem, postmortem examination |
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| autoradiograph | (noun) a radiogram produced by radiation emitted by the specimen being photographed | - |
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| autoradiography | (noun) producing a radiograph by means of the radiation emitted from the specimen being photographed | - |
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| autoregulation | (noun) (physiology) processes that maintain a generally constant physiological state in a cell or organism | - |
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| autosexing | (noun) (especially of domestic fowl) breeding to reveal differential sex characteristics at hatching | - |
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| autosome | (noun) any chromosome that is not a sex chromosome; appear in pairs in body cells but as single chromosomes in spermatozoa | Synonyms: somatic chromosome |
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| autostereotype | (noun) the standardized mental picture held in common by members of a cultural group depicting an oversimplified image of themselves and their behaviour. | - |
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| autostrada | (noun) an expressway in an Italian-speaking country | - |
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| autosuggestion | (noun) a system for self-improvement developed by Emile Coue which was popular in the 1920s and 1930s | Synonyms: auto-suggestion, self-suggestion |
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| autotelism | (noun) belief that a work of art is an end in itself or its own justification | - |
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| autotomy | (noun) spontaneous removal or casting off of a body part (as the tail of a lizard or claw of a lobster) especially when the organism is injured or under attack | - |
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| autotroph | (noun) plant capable of synthesizing its own food from simple organic substances | Synonyms: autophyte, autophytic plant, autotrophic organism |
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| autotype | (noun) an exact copy or reproduction | Synonyms: facsimile |
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| (noun) process for producing permanent prints in a carbon pigment | Synonyms: autotypy |
| autotypy | (noun) process for producing permanent prints in a carbon pigment | Synonyms: autotype |
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| autumn | (noun) the season when the leaves fall from the trees | Synonyms: fall |
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| auxesis | (noun) growth from increase in cell size without cell division | - |
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| auxiliary | (noun) someone who acts as assistant | Synonyms: aide |
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| auxin | (noun) a plant hormone that promotes root formation and bud growth | - |
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| avifauna | (noun) the birds of a particular region or period | - |
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| baccalaureate | (noun) an academic degree conferred on someone who has successfully completed undergraduate studies | Synonyms: bachelor's degree |
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| (noun) a farewell sermon to a graduating class at their commencement ceremonies | - |
| bandeau | (noun) an undergarment worn by women to support their breasts | Synonyms: bra, brassiere |
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| barosaur | (noun) a dinosaur that could grow to be as tall as a building five stories tall | Synonyms: barosaurus |
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| barosaurus | (noun) a dinosaur that could grow to be as tall as a building five stories tall | Synonyms: barosaur |
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| bauble | (noun) cheap showy jewelry or ornament on clothing | Synonyms: bangle, fallal, gaud, gewgaw, novelty, trinket |
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| (noun) a mock scepter carried by a court jester | - |
| baud | (noun) (computer science) a data transmission rate (bits/second) for modems | Synonyms: baud rate |
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| baulk | (noun) one of several parallel sloping beams that support a roof | Synonyms: balk, rafter |
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| (noun) something immaterial that interferes with or delays action or progress | Synonyms: balk, check, deterrent, handicap, hinderance, hindrance, impediment |
| (noun) the area on a billiard table behind the balkline | Synonyms: balk |
| baulker | (noun) a person who refuses to comply | Synonyms: balker, noncompliant |
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| bauxite | (noun) a clay-like mineral; the chief ore of aluminum; composed of aluminum oxides and aluminum hydroxides; used as an abrasive and catalyst | - |
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| beau | (noun) a man who is the lover of a man or woman | Synonyms: boyfriend, fellow, swain |
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| (noun) a man who is much concerned with his dress and appearance | Synonyms: clotheshorse, dandy, dude, fashion plate, fop, gallant, sheik, swell |
| beaugregory | (noun) a blue and yellow damselfish of Bermuda and Florida and the West Indies | Synonyms: Pomacentrus leucostictus |
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| beaut | (noun) an outstanding example of its kind | Synonyms: beauty |
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| beauteousness | (noun) the quality of being good looking and attractive | Synonyms: comeliness, fairness, loveliness |
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| beautician | (noun) someone who works in a beauty parlor | Synonyms: cosmetician |
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| beautification | (noun) the act of making something more beautiful | - |
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| beauty | (noun) the qualities that give pleasure to the senses | - |
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| (noun) an outstanding example of its kind | Synonyms: beaut |
| (noun) a very attractive or seductive looking woman | Synonyms: dish, knockout, looker, lulu, mantrap, peach, ravisher, smasher, stunner, sweetheart |
| brontosaur | (noun) huge quadrupedal herbivorous dinosaur common in North America in the late Jurassic | Synonyms: apatosaur, apatosaurus, Apatosaurus excelsus, brontosaurus, thunder lizard |
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| brontosaurus | (noun) huge quadrupedal herbivorous dinosaur common in North America in the late Jurassic | Synonyms: apatosaur, apatosaurus, Apatosaurus excelsus, brontosaur, thunder lizard |
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| bureau | (noun) furniture with drawers for keeping clothes | Synonyms: chest, chest of drawers, dresser |
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| (noun) an administrative unit of government | Synonyms: agency, authority, federal agency, government agency, office |
| bureaucracy | (noun) nonelective government officials | Synonyms: bureaucratism |
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| (noun) a government that is administered primarily by bureaus that are staffed with nonelective officials | - |
| (noun) any organization in which action is obstructed by insistence on unnecessary procedures and red tape | - |
| bureaucrat | (noun) an official of a bureaucracy | Synonyms: administrative official |
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| bureaucratism | (noun) nonelective government officials | Synonyms: bureaucracy |
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| carnauba | (noun) Brazilian fan palm having an edible root; source of a useful leaf fiber and a brittle yellowish wax | Synonyms: carnauba palm, Copernicia cerifera, Copernicia prunifera, wax palm |
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| (noun) hard yellowish to brownish wax from leaves of the carnauba palm used especially in floor waxes and polishes | Synonyms: carnauba wax |
| carnosaur | (noun) large carnivorous bipedal dinosaur having huge claws | - |
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| catacaustic | (noun) a caustic curve formed by light reflecting from a curved surface. | - |
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| caterwaul | (noun) the yowling sound made by a cat in heat | - |
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| caucus | (noun) a closed political meeting | - |
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| cauda | (noun) any taillike structure | - |
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| caudate | (noun) amphibians that resemble lizards | Synonyms: urodele |
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| (noun) a tail-shaped basal ganglion located in a lateral ventricle of the brain | Synonyms: caudate nucleus |
| caudex | (noun) woody stem of palms and tree ferns | - |
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| (noun) persistent thickened stem of a herbaceous perennial plant | Synonyms: stock |
| caul | (noun) the inner membrane of embryos in higher vertebrates (especially when covering the head at birth) | Synonyms: embryonic membrane, veil |
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| (noun) part of the peritoneum attached to the stomach and to the colon and covering the intestines | Synonyms: gastrocolic omentum, greater omentum |
| cauldron | (noun) a very large pot that is used for boiling | Synonyms: caldron |
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| cauliflower | (noun) compact head of white undeveloped flowers | - |
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| (noun) a plant having a large edible head of crowded white flower buds | Synonyms: Brassica oleracea botrytis |
| caulk | (noun) a waterproof filler and sealant that is used in building and repair to make watertight | Synonyms: caulking |
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| caulking | (noun) a waterproof filler and sealant that is used in building and repair to make watertight | Synonyms: caulk |
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| causa | (noun) a comprehensive term for any proceeding in a court of law whereby an individual seeks a legal remedy | Synonyms: case, cause, lawsuit, suit |
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