| bogeyman | (noun) an imaginary monster used to frighten children | Synonyms: booger, boogeyman, bugaboo, bugbear |
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| bohemian | (adjective) unconventional in especially appearance and behavior | - |
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| (noun) a nonconformist writer or artist who lives an unconventional life | - |
| bombardon | (noun) a large shawm; the bass member of the shawm family | Synonyms: bombard |
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| (noun) a tuba that coils over the shoulder of the musician | Synonyms: helicon |
| bombilation | (noun) sound of rapid vibration | Synonyms: bombination, buzz |
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| bombination | (noun) sound of rapid vibration | Synonyms: bombilation, buzz |
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| bonbon | (noun) a candy that usually has a center of fondant or fruit or nuts coated in chocolate | - |
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| bondman | (noun) a male slave | Synonyms: bondsman |
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| (noun) a male bound to serve without wages | Synonyms: bondsman |
| bondsman | (noun) a male slave | Synonyms: bondman |
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| (noun) a male bound to serve without wages | Synonyms: bondman |
| (noun) a male who signs a bond as surety for someone else | - |
| bondsperson | (noun) someone who signs a bond as surety for someone else | - |
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| bondswoman | (noun) a female slave | Synonyms: bondmaid, bondwoman |
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| (noun) a female bound to serve without wages | Synonyms: bondmaid, bondwoman |
| (noun) a female who signs a bond as surety for someone else | - |
| bondwoman | (noun) a female slave | Synonyms: bondmaid, bondswoman |
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| (noun) a female bound to serve without wages | Synonyms: bondmaid, bondswoman |
| boogeyman | (noun) an imaginary monster used to frighten children | Synonyms: bogeyman, booger, bugaboo, bugbear |
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| bookman | (noun) a learned person; someone who by long study has gained mastery in one or more disciplines | Synonyms: scholar, scholarly person |
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| boon | (adjective) very close and convivial | - |
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| (noun) a desirable state | Synonyms: blessing |
| born | (adjective) brought into existence | - |
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| (adjective) being talented through inherited qualities | Synonyms: innate, natural |
| boron | (noun) a trivalent metalloid element; occurs both in a hard black crystal and in the form of a yellow or brown powder | Synonyms: atomic number 5, B |
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| boson | (noun) any particle that obeys Bose-Einstein statistics but not the Pauli exclusion principle; all nuclei with an even mass number are bosons | - |
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| bosun | (noun) a petty officer on a merchant ship who controls the work of other seamen | Synonyms: bo's'n, bo'sun, boatswain, bos'n |
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| botheration | (noun) something or someone that causes trouble; a source of unhappiness | Synonyms: annoyance, bother, infliction, nuisance, pain, pain in the ass, pain in the neck |
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| (noun) the psychological state of being irritated or annoyed | Synonyms: annoyance, irritation, vexation |
| botulin | (noun) potent bacterial toxin produced by the bacterium Clostridium botulinum that causes botulism; can be used as a bioweapon | Synonyms: botulinus toxin, botulismotoxin |
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| botulismotoxin | (noun) potent bacterial toxin produced by the bacterium Clostridium botulinum that causes botulism; can be used as a bioweapon | Synonyms: botulin, botulinus toxin |
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| boughten | (adjective) purchased; not homemade | Synonyms: store-bought |
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| bouillon | (noun) a clear seasoned broth | - |
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| bounden | (adjective) morally obligatory | - |
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| bourbon | (noun) whiskey distilled from a mash of corn and malt and rye and aged in charred oak barrels | - |
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| bourdon | (noun) a pipe of the bagpipe that is tuned to produce a single continuous tone | Synonyms: drone, drone pipe |
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| bourgeon | (verb) produce buds, branches, or germinate | Synonyms: burgeon forth, germinate, pullulate, shoot, sprout, spud |
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| bourguignon | (noun) reduced red wine with onions and parsley and thyme and butter | Synonyms: bourguignon sauce, Burgundy sauce |
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| bourn | (noun) an archaic term for a goal or destination | Synonyms: bourne |
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| (noun) an archaic term for a boundary | Synonyms: bourne |
| boustrophedon | (noun) an ancient writing system: having alternate lines written in opposite directions; literally `as the ox ploughs' | - |
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| bowdlerisation | (noun) the act of deleting or modifying all passages considered to be indecent | Synonyms: bowdlerization |
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| (noun) written material that has been bowdlerized | Synonyms: bowdlerization |
| bowdlerization | (noun) the act of deleting or modifying all passages considered to be indecent | Synonyms: bowdlerisation |
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| (noun) written material that has been bowdlerized | Synonyms: bowdlerisation |
| bowfin | (noun) primitive long-bodied carnivorous freshwater fish with a very long dorsal fin; found in sluggish waters of North America | Synonyms: Amia calva, dogfish, grindle |
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| bowman | (noun) a person who is expert in the use of a bow and arrow | Synonyms: archer |
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| boxthorn | (noun) any of various shrubs or vines of the genus Lycium with showy flowers and bright berries | Synonyms: matrimony vine |
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| brachiation | (noun) swinging by the arms from branch to branch | - |
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| brachyuran | (noun) typical crabs | - |
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| bracken | (noun) large coarse fern often several feet high; essentially weed ferns; cosmopolitan | Synonyms: brake, pasture brake, Pteridium aquilinum |
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| (noun) fern of southeastern Asia; not hardy in cold temperate regions | Synonyms: Pteridium esculentum |
| brahman | (noun) the highest of the four varnas: the priestly or sacerdotal category | Synonyms: brahmin |
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| (noun) a member of the highest of the four Hindu varnas | Synonyms: brahmin |
| (noun) a member of a social and cultural elite (especially a descendant of an old New England family) | Synonyms: brahmin |
| brahmin | (noun) the highest of the four varnas: the priestly or sacerdotal category | Synonyms: brahman |
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| (noun) a member of the highest of the four Hindu varnas | Synonyms: brahman |
| (noun) a member of a social and cultural elite (especially a descendant of an old New England family) | Synonyms: brahman |
| brain | (noun) that part of the central nervous system that includes all the higher nervous centers; enclosed within the skull; continuous with the spinal cord | Synonyms: encephalon |
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| (noun) mental ability | Synonyms: brainpower, learning ability, mental capacity, mentality, wit |
| (noun) that which is responsible for one's thoughts, feelings, and conscious brain functions; the seat of the faculty of reason | Synonyms: head, mind, nous, psyche |
| (noun) the brain of certain animals used as meat | - |
| (noun) someone who has exceptional intellectual ability and originality | Synonyms: brainiac, Einstein, genius, mastermind |
| (verb) hit on the head | - |
| (verb) kill by smashing someone's skull | - |
| brainpan | (noun) the part of the skull that encloses the brain | Synonyms: braincase, cranium |
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| brakeman | (noun) a railroad employee responsible for a train's brakes | - |
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| bran | (noun) food prepared from the husks of cereal grains | - |
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| (noun) broken husks of the seeds of cereal grains that are separated from the flour by sifting | - |
| branchiopodan | (adjective) of or relating to or characteristic of the subclass Branchiopoda | Synonyms: branchiopod, branchiopodous |
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| (noun) aquatic crustaceans typically having a carapace and many pairs of leaflike appendages used for swimming as well as respiration and feeding | Synonyms: branchiopod, branchiopod crustacean |
| brawn | (noun) possessing muscular strength | Synonyms: brawniness, heftiness, muscle, muscularity, sinew |
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| brazen | (adjective) made of or resembling brass (as in color or hardness) | - |
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| (adjective) unrestrained by convention or propriety | Synonyms: audacious, bald-faced, barefaced, bodacious, brassy, brazen-faced, insolent |
| (verb) face with defiance or impudence | - |
| breakdown | (noun) the act of disrupting an established order so it fails to continue | Synonyms: dislocation |
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| (noun) an analysis into mutually exclusive categories | Synonyms: partitioning |
| (noun) a cessation of normal operation | Synonyms: equipment failure |
| (noun) (biology) the process of decay caused by bacterial or fungal action | Synonyms: decomposition, putrefaction, rot, rotting |
| (noun) (chemistry) separation of a substance into two or more substances that may differ from each other and from the original substance | Synonyms: chemical decomposition reaction, decomposition, decomposition reaction |
| (noun) a mental or physical breakdown | Synonyms: crack-up |
| breastpin | (noun) a decorative pin worn by women | Synonyms: broach, brooch |
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| brethren | (noun) (plural) the lay members of a male religious order | - |
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| brickkiln | (noun) a kiln for making bricks | - |
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| bridoon | (noun) a bit resembling a snaffle bit; used with a separate curb | - |
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| brighten | (verb) make more cheerful through the use of color | Synonyms: lighten, lighten up |
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| (verb) become clear | Synonyms: clear, clear up, light up |
| brisken | (verb) become brisk | Synonyms: brisk, brisk up |
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| broaden | (verb) become broader | - |
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| (verb) make broader | - |
| (verb) extend in scope or range or area | Synonyms: extend, widen |
| (verb) vary in order to spread risk or to expand | Synonyms: branch out, diversify |
| brogan | (noun) a thick and heavy shoe | Synonyms: brogue, clodhopper, work shoe |
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| broken | (adjective) physically and forcibly separated into pieces or cracked or split | - |
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| (adjective) not continuous in space, time, or sequence or varying abruptly | - |
| (adjective) (especially of promises or contracts) having been violated or disregarded | Synonyms: unkept |
| (adjective) out of working order (`busted' is an informal substitute for `broken') | Synonyms: busted |
| (adjective) destroyed financially | Synonyms: impoverished, wiped out |
| (adjective) thrown into a state of disarray or confusion | Synonyms: confused, disordered, upset |
| (adjective) discontinuous | - |
| (adjective) subdued or brought low in condition or status | Synonyms: crushed, humbled, humiliated, low |
| (adjective) weakened and infirm | - |
| (adjective) imperfectly spoken or written | - |
| (adjective) lacking a part or parts | - |
| (adjective) topographically very uneven | Synonyms: rugged |
| (adjective) tamed or trained to obey | Synonyms: broken in |
| bromeosin | (noun) a red fluorescent dye resulting from the action of bromine on fluorescein; used in cosmetics and as a biological stain for studying cell structures | Synonyms: eosin |
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| broomcorn | (noun) tall grasses grown for the elongated stiff-branched panicle used for brooms and brushes | Synonyms: Sorghum vulgare technicum |
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| brown | (adjective) (of skin) deeply suntanned | Synonyms: browned |
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| (adjective) of a color similar to that of wood or earth | Synonyms: brownish, chocolate-brown, dark-brown |
| (noun) an orange of low brightness and saturation | Synonyms: brownness |
| (verb) fry in a pan until it changes color | - |
| (verb) make brown in color | Synonyms: embrown |
| bruin | (noun) large ferocious bear of Eurasia | Synonyms: brown bear, Ursus arctos |
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| (noun) a conventional name for a bear used in tales following usage in the old epic `Reynard the Fox' | - |
| brutalisation | (noun) an act that makes people cruel or lacking normal human qualities | Synonyms: animalisation, animalization, brutalization |
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| (noun) the activity of treating someone savagely or viciously | Synonyms: brutalization |
| (noun) the condition of being treated in a cruel and savage manner | Synonyms: brutalization |
| brutalization | (noun) an act that makes people cruel or lacking normal human qualities | Synonyms: animalisation, animalization, brutalisation |
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| (noun) the activity of treating someone savagely or viciously | Synonyms: brutalisation |
| (noun) the condition of being treated in a cruel and savage manner | Synonyms: brutalisation |
| bryozoan | (noun) sessile aquatic animal forming mossy colonies of small polyps each having a curved or circular ridge bearing tentacles; attach to stones or seaweed and reproduce by budding | Synonyms: moss animal, polyzoan, sea mat, sea moss |
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| buckbean | (noun) perennial plant of Europe and America having racemes of white or purplish flowers and intensely bitter trifoliate leaves; often rooting at water margin and spreading across the surface | Synonyms: bog myrtle, bogbean, marsh trefoil, Menyanthes trifoliata, water shamrock |
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| buckskin | (noun) horse of a light yellowish dun color with dark mane and tail | - |
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| (noun) a soft yellowish suede leather originally from deerskin but now usually from sheepskin | - |
| buckthorn | (noun) any shrub or small tree of the genus Bumelia | - |
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| (noun) a shrub or shrubby tree of the genus Rhamnus; fruits are source of yellow dyes or pigments | - |
| (noun) an Old World plantain with long narrow ribbed leaves widely established in temperate regions | Synonyms: English plantain, narrow-leaved plantain, Plantago lanceolata, ribgrass, ribwort, ripple-grass |
| buffoon | (noun) a person who amuses others by ridiculous behavior | Synonyms: clown, goof, goofball, merry andrew |
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| (noun) a rude or vulgar fool | Synonyms: clown |
| bulletin | (noun) a brief report (especially an official statement issued for immediate publication or broadcast) | - |
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| (verb) make public by bulletin | - |
| bullhorn | (noun) a portable loudspeaker with built-in microphone and amplifier | Synonyms: loud-hailer, loud hailer |
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| bullion | (noun) gold or silver in bars or ingots | - |
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| (noun) a mass of precious metal | - |
| bullpen | (noun) a large cell where prisoners (people awaiting trial or sentence or refugees or illegal immigrants) are confined together temporarily | Synonyms: detention cell, detention centre |
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| (noun) a place on a baseball field where relief pitchers can warm up during a game | - |
| bumpkin | (noun) a person who is not very intelligent or interested in culture | Synonyms: chawbacon, hayseed, hick, rube, yahoo, yokel |
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| bun | (noun) small rounded bread either plain or sweet | Synonyms: roll |
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| bunion | (noun) a painful swelling of the bursa of the first joint of the big toe | - |
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| bunsen | (noun) a gas burner used in laboratories; has an air valve to regulate the mixture of gas and air | Synonyms: bunsen burner, etna |
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| burden | (noun) weight to be borne or conveyed | Synonyms: load, loading |
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| (noun) the central idea that is expanded in a document or discourse | - |
| (noun) an onerous or difficult concern | Synonyms: encumbrance, incumbrance, load, onus |
| (noun) the central meaning or theme of a speech or literary work | Synonyms: core, effect, essence, gist |
| (verb) impose a task upon, assign a responsibility to | Synonyms: charge, saddle |
| (verb) weight down with a load | Synonyms: burthen, weight, weight down |
| burgeon | (verb) grow and flourish | - |
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| burin | (noun) a chisel of tempered steel with a sharp point; used for engraving | - |
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| burn | (noun) damage inflicted by fire | - |
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| (noun) a place or area that has been burned (especially on a person's body) | Synonyms: burn mark |
| (noun) pain that feels hot as if it were on fire | Synonyms: burning |
| (noun) an injury caused by exposure to heat or chemicals or radiation | - |
| (verb) get a sunburn by overexposure to the sun | Synonyms: sunburn |
| (verb) undergo combustion | Synonyms: combust |
| (verb) cause to undergo combustion | Synonyms: incinerate |
| (verb) destroy by fire | Synonyms: burn down, fire |
| (verb) damage by burning with heat, fire, or radiation | - |
| (verb) burn, sear, or freeze (tissue) using a hot iron or electric current or a caustic agent | Synonyms: cauterise, cauterize |
| (verb) use up (energy) | Synonyms: burn off, burn up |
| (verb) create by duplicating data | Synonyms: cut |
| (verb) feel strong emotion, especially anger or passion | - |
| (verb) cause a sharp or stinging pain or discomfort | Synonyms: bite, sting |
| (verb) feel hot or painful | - |
| (verb) spend (significant amounts of money) | - |
| (verb) execute by tying to a stake and setting alight | - |
| (verb) shine intensely, as if with heat | Synonyms: glow |
| (verb) cause to burn or combust | Synonyms: combust |
| burthen | (noun) a variant of `burden' | - |
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| (verb) weight down with a load | Synonyms: burden, weight, weight down |
| bushman | (noun) a dweller in the Australian bush country | - |
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| businessman | (noun) a person engaged in commercial or industrial business (especially an owner or executive) | Synonyms: man of affairs |
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| businessmen | (noun) the body of individuals who manage businesses | Synonyms: business community |
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| businessperson | (noun) a capitalist who engages in industrial commercial enterprise | Synonyms: bourgeois |
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| businesswoman | (noun) a female businessperson | - |
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| buskin | (noun) a boot reaching halfway up to the knee | Synonyms: combat boot, desert boot, half boot, top boot |
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| busman | (noun) someone who drives a bus | Synonyms: bus driver |
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| butterbean | (noun) small flat green bean similar to lima beans | Synonyms: butter bean, civet bean, sieva bean |
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| button | (noun) a round fastener sewn to shirts and coats etc to fit through buttonholes | - |
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| (noun) an electrical switch operated by pressing | Synonyms: push, push button |
| (noun) a device that when pressed will release part of a mechanism | Synonyms: release |
| (noun) any artifact that resembles a button | - |
| (noun) a specific area or icon in graphical user interface systems that is clicked or pressed in order to select a command or perform an action | - |
| (noun) a female sexual organ homologous to the penis | Synonyms: clit, clitoris |
| (noun) a round flat badge displaying information and suitable for pinning onto a garment | - |
| (noun) any of various plant parts that resemble buttons | - |
| (verb) fasten with buttons | - |
| (verb) provide with buttons | - |
| butyrin | (noun) any of three glycerides of butyric acid | - |
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| cabin | (noun) the enclosed compartment of an aircraft or spacecraft where passengers are carried | - |
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| (noun) small room on a ship or boat where people sleep | - |
| (noun) a small house built of wood; usually in a wooded area | - |
| (verb) confine to a small space, such as a cabin | - |
| cabman | (noun) someone who drives a taxi for a living | Synonyms: cabby, cabdriver, hack-driver, hack driver, livery driver, taxidriver, taximan |
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| cabochon | (noun) a highly polished gem that is cut convexly but without facets | - |
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| cachinnation | (noun) loud convulsive laughter | - |
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| cacodaemon | (noun) an evil spirit | Synonyms: cacodemon |
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| cacodemon | (noun) an evil spirit | Synonyms: cacodaemon |
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| caducean | (adjective) of or relating to a caduceus | - |
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| caecilian | (adjective) of or relating to or belonging to the family Caeciliidae | - |
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| (noun) any of the small slender limbless burrowing wormlike amphibians of the order Gymnophiona; inhabit moist soil in tropical regions | Synonyms: blindworm |
| caesarean | (adjective) relating to abdominal delivery | Synonyms: caesarian, cesarean, cesarian |
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| (noun) the delivery of a fetus by surgical incision through the abdominal wall and uterus (from the belief that Julius Caesar was born that way) | Synonyms: abdominal delivery, C-section, caesarean delivery, caesarean section, caesarian, caesarian delivery, caesarian section, cesarean, cesarean delivery, cesarean section, cesarian, cesarian section |