| boom | (noun) any of various more-or-less horizontal spars or poles used to extend the foot of a sail or for handling cargo or in mooring | - |
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| (noun) a pole carrying an overhead microphone projected over a film or tv set | Synonyms: microphone boom |
| (noun) a deep prolonged loud noise | Synonyms: roar, roaring, thunder |
| (noun) a sudden happening that brings good fortune (as a sudden opportunity to make money) | Synonyms: bonanza, bunce, godsend, gold rush, gravy, manna from heaven, windfall |
| (noun) a state of economic prosperity | - |
| boomer | (noun) a member of the baby boom generation in the 1950s | Synonyms: baby boomer |
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| boomerang | (noun) a miscalculation that recoils on its maker | Synonyms: backfire |
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| (noun) a curved piece of wood; when properly thrown will return to thrower | Synonyms: throw stick, throwing stick |
| boon | (noun) a desirable state | Synonyms: blessing |
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| boondocks | (noun) a remote and undeveloped area | Synonyms: back country, backwoods, hinterland |
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| boondoggle | (noun) work of little or no value done merely to look busy | - |
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| boor | (noun) a crude uncouth ill-bred person lacking culture or refinement | Synonyms: barbarian, churl, Goth, peasant, tike, tyke |
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| boorishness | (noun) inelegance by virtue of being an uncouth boor | Synonyms: uncouthness |
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| (noun) the manner of a rude or insensitive person | - |
| boost | (noun) the act of giving hope or support to someone | Synonyms: encouragement |
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| (noun) the act of giving a push | - |
| (noun) an increase in cost | Synonyms: cost increase, hike, rise |
| booster | (noun) an additional dose that makes sure the first dose was effective | Synonyms: booster dose, booster shot, recall dose |
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| (noun) the first stage of a multistage rocket | Synonyms: booster rocket, booster unit, takeoff booster, takeoff rocket |
| (noun) an amplifier for restoring the strength of a transmitted signal | Synonyms: booster amplifier, booster station, relay link, relay station, relay transmitter |
| (noun) a thief who steals goods that are in a store | Synonyms: lifter, shoplifter |
| (noun) someone who is an active supporter and advocate | Synonyms: plugger, promoter |
| (noun) a person who backs a politician or a team etc. | Synonyms: admirer, champion, friend, protagonist, supporter |
| boot | (noun) the act of delivering a blow with the foot | Synonyms: kick, kicking |
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| (noun) a form of foot torture in which the feet are encased in iron and slowly crushed | - |
| (noun) footwear that covers the whole foot and lower leg | - |
| (noun) compartment in an automobile that carries luggage or shopping or tools | Synonyms: automobile trunk, luggage compartment, trunk |
| (noun) an instrument of torture that is used to heat or crush the foot and leg | Synonyms: iron boot, iron heel, the boot |
| (noun) protective casing for something that resembles a leg | - |
| (noun) the swift release of a store of affective force | Synonyms: bang, charge, flush, kick, rush, thrill |
| bootblack | (noun) a person who polishes shoes and boots | Synonyms: shoeblack |
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| bootboys | (noun) a youth subculture that appeared first in England in the late 1960s as a working-class reaction to the hippies; hair was cropped close to the scalp; wore work-shirts and short jeans (supported by suspenders) and heavy red boots; involved in attacks against Asians and football hooliganism | Synonyms: skinheads |
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| bootee | (noun) a slipper that is soft and wool (for babies) | Synonyms: bootie |
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| booth | (noun) small area set off by walls for special use | Synonyms: cubicle, kiosk, stall |
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| (noun) a small shop at a fair; for selling goods or entertainment | - |
| (noun) a table (in a restaurant or bar) surrounded by two high-backed benches | - |
| boothose | (noun) protective stockings worn with or in place of boots | - |
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| bootie | (noun) a slipper that is soft and wool (for babies) | Synonyms: bootee |
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| bootjack | (noun) has V-shaped notch for pulling off boots | - |
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| bootlace | (noun) a long lace for fastening boots | - |
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| bootleg | (noun) the part of a boot above the instep | - |
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| (noun) whiskey illegally distilled from a corn mash | Synonyms: corn liquor, moonshine |
| bootlegger | (noun) someone who makes or sells illegal liquor | Synonyms: moonshiner |
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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 | - |
| bootlicker | (noun) someone who humbles himself as a sign of respect; who behaves as if he had no self-respect | Synonyms: apple polisher, fawner, groveler, groveller, truckler |
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| bootmaker | (noun) a maker of boots | Synonyms: boot maker |
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| bootstrap | (noun) a strap that is looped and sewn to the top of a boot for pulling it on | - |
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| booty | (noun) goods or money obtained illegally | Synonyms: dirty money, loot, pillage, plunder, prize, swag |
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| booyong | (noun) large tree of Australasia | Synonyms: brown oak, crow's foot, Heritiera trifoliolata, red beech, silky elm, stave wood, Terrietia trifoliolata |
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| booze | (noun) an alcoholic beverage that is distilled rather than fermented | Synonyms: hard drink, hard liquor, John Barleycorn, liquor, spirits, strong drink |
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| boozer | (noun) a person who drinks alcohol to excess habitually | Synonyms: alcoholic, alky, dipsomaniac, lush, soaker, souse |
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| boozing | (noun) the act of drinking alcoholic beverages to excess | Synonyms: crapulence, drink, drinking, drunkenness |
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| bop | (noun) an early form of modern jazz (originating around 1940) | Synonyms: bebop |
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| bopeep | (noun) a game played with young children; you hide your face and suddenly reveal it as you say boo! | Synonyms: peekaboo |
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| borage | (noun) an herb whose leaves are used to flavor sauces and punches; young leaves can be eaten in salads or cooked | - |
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| (noun) hairy blue-flowered European annual herb long used in herbal medicine and eaten raw as salad greens or cooked like spinach | Synonyms: Borago officinalis, tailwort |
| borate | (noun) a salt or ester of boric acid | - |
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| borax | (noun) an ore of boron consisting of hydrated sodium borate; used as a flux or cleansing agent | - |
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| bordelaise | (noun) brown sauce with beef marrow and red wine | - |
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| bordello | (noun) a building where prostitutes are available | Synonyms: bagnio, bawdyhouse, brothel, cathouse, house of ill repute, house of prostitution, sporting house, whorehouse |
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| border | (noun) a strip forming the outer edge of something | - |
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| (noun) a decorative recessed or relieved surface on an edge | Synonyms: molding, moulding |
| (noun) a line that indicates a boundary | Synonyms: borderline, boundary line, delimitation, mete |
| (noun) the boundary of a surface | Synonyms: edge |
| (noun) the boundary line or the area immediately inside the boundary | Synonyms: margin, perimeter |
| borderer | (noun) an inhabitant of a border area (especially the border between Scotland and England) | - |
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| borderland | (noun) district consisting of the area on either side of a border or boundary of a country or an area | Synonyms: border district, march, marchland |
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| borderline | (noun) a line that indicates a boundary | Synonyms: border, boundary line, delimitation, mete |
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| bore | (noun) a hole or passage made by a drill; usually made for exploratory purposes | Synonyms: bore-hole, drill hole |
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| (noun) diameter of a tube or gun barrel | Synonyms: caliber, calibre, gauge |
| (noun) a high wave (often dangerous) caused by tidal flow (as by colliding tidal currents or in a narrow estuary) | Synonyms: aegir, eager, eagre, tidal bore |
| (noun) a person who evokes boredom | Synonyms: dullard |
| boreas | (noun) a wind that blows from the north | Synonyms: north wind, norther, northerly |
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| borecole | (noun) a hardy cabbage with coarse curly leaves that do not form a head | Synonyms: Brassica oleracea acephala, cole, colewort, kail, kale |
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| boredom | (noun) the feeling of being bored by something tedious | Synonyms: ennui, tedium |
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| borer | (noun) any of various insects or larvae or mollusks that bore into wood | Synonyms: woodborer |
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| (noun) a drill for penetrating rock | Synonyms: bore bit, rock drill, stone drill |
| boring | (noun) the act of drilling a hole in the earth in the hope of producing petroleum | Synonyms: drilling, oil production |
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| (noun) the act of drilling | Synonyms: drilling |
| boringness | (noun) extreme dullness; lacking spirit or interest | Synonyms: dreariness, insipidity, insipidness |
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| bornite | (noun) a mineral consisting of sulfides of copper and iron that is found in copper deposits | Synonyms: peacock ore |
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| 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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| borosilicate | (noun) a salt of boric and silicic acids | - |
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| borough | (noun) one of the administrative divisions of a large city | - |
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| (noun) an English town that forms the constituency of a member of parliament | - |
| borrelia | (noun) cause of e.g. European and African relapsing fever | - |
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| borrower | (noun) someone who receives something on the promise to return it or its equivalent | - |
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| borrowing | (noun) obtaining funds from a lender | - |
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| (noun) the appropriation (of ideas or words etc) from another source | Synonyms: adoption |
| borsch | (noun) a Russian or Polish soup usually containing beet juice as a foundation | Synonyms: borscht, borsh, borshch, borsht, bortsch |
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| borscht | (noun) a Russian or Polish soup usually containing beet juice as a foundation | Synonyms: borsch, borsh, borshch, borsht, bortsch |
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| borsh | (noun) a Russian or Polish soup usually containing beet juice as a foundation | Synonyms: borsch, borscht, borshch, borsht, bortsch |
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| borshch | (noun) a Russian or Polish soup usually containing beet juice as a foundation | Synonyms: borsch, borscht, borsh, borsht, bortsch |
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| borsht | (noun) a Russian or Polish soup usually containing beet juice as a foundation | Synonyms: borsch, borscht, borsh, borshch, bortsch |
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| borstal | (noun) formerly a British reform school for youths considered too young to send to prison | - |
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| bortsch | (noun) a Russian or Polish soup usually containing beet juice as a foundation | Synonyms: borsch, borscht, borsh, borshch, borsht |
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| borzoi | (noun) tall fast-moving dog breed | Synonyms: Russian wolfhound |
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| bosc | (noun) greenish-yellow pear | - |
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| bosh | (noun) pretentious or silly talk or writing | Synonyms: baloney, bilgewater, boloney, drool, humbug, taradiddle, tarradiddle, tommyrot, tosh, twaddle |
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| bosie | (noun) a cricket ball bowled as if to break one way that actually breaks in the opposite way | Synonyms: bosie ball, googly, wrong 'un |
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| bosk | (noun) a small wooded area | - |
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| bosom | (noun) a close affectionate and protective acceptance | Synonyms: embrace |
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| (noun) cloth that covers the chest or breasts | - |
| (noun) either of two soft fleshy milk-secreting glandular organs on the chest of a woman | Synonyms: boob, breast, knocker, tit, titty |
| (noun) a person's breast or chest | - |
| (noun) the locus of feelings and intuitions | Synonyms: heart |
| (noun) the chest considered as the place where secret thoughts are kept | - |
| 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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| boss | (noun) a circular rounded projection or protuberance | Synonyms: knob |
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| (noun) a person responsible for hiring workers | Synonyms: hirer |
| (noun) a person who exercises control over workers | Synonyms: chief, foreman, gaffer, honcho |
| (noun) a leader in a political party who controls votes and dictates appointments | Synonyms: party boss, political boss |
| (noun) a person who exercises control and makes decisions | - |
| bossism | (noun) domination of a political organization by a party boss | - |
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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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| bot | (noun) botfly larva; typically develops inside the body of a horse or sheep or human | - |
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| bota | (noun) a wine bottle made of leather | - |
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| botanical | (noun) a drug made from part of a plant (as the bark or root or leaves) | - |
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| botanist | (noun) a biologist specializing in the study of plants | Synonyms: phytologist, plant scientist |
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| botany | (noun) the branch of biology that studies plants | Synonyms: phytology |
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| (noun) all the plant life in a particular region or period | Synonyms: flora, vegetation |
| botch | (noun) an embarrassing mistake | Synonyms: bloomer, blooper, blunder, boner, boo-boo, bungle, flub, foul-up, fuckup, pratfall |
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| botcher | (noun) someone who makes mistakes because of incompetence | Synonyms: blunderer, bumbler, bungler, butcher, fuckup, fumbler, sad sack, stumbler |
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| botfly | (noun) stout-bodied hairy dipterous fly whose larvae are parasites on humans and other mammals | - |
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| bother | (noun) something or someone that causes trouble; a source of unhappiness | Synonyms: annoyance, botheration, infliction, nuisance, pain, pain in the ass, pain in the neck |
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| (noun) an angry disturbance | Synonyms: fuss, hassle, trouble |
| 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 |
| bottle | (noun) a glass or plastic vessel used for storing drinks or other liquids; typically cylindrical without handles and with a narrow neck that can be plugged or capped | - |
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| (noun) a vessel fitted with a flexible teat and filled with milk or formula; used as a substitute for breast feeding infants and very young children | Synonyms: feeding bottle, nursing bottle |
| (noun) the quantity contained in a bottle | Synonyms: bottleful |
| bottlebrush | (noun) a cylindrical brush on a thin shaft that is used to clean bottles | - |
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| bottlecap | (noun) a cap that seals a bottle | - |
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| bottleful | (noun) the quantity contained in a bottle | Synonyms: bottle |
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| bottleneck | (noun) the narrow part of a bottle near the top | - |
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| (noun) a narrowing that reduces the flow through a channel | Synonyms: chokepoint, constriction |
| bottlenose | (noun) northern Atlantic beaked whale with a bulbous forehead | Synonyms: bottle-nosed whale, bottlenose whale, Hyperoodon ampullatus |
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| (noun) any of several dolphins with rounded forehead and well-developed beak; chiefly of northern Atlantic and Mediterranean | Synonyms: bottle-nosed dolphin, bottlenose dolphin |
| bottler | (noun) a manufacturer that makes and bottles beverages | - |
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| bottom | (noun) a cargo ship | Synonyms: freighter, merchant ship, merchantman |
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| (noun) the fleshy part of the human body that you sit on | Synonyms: arse, ass, backside, behind, bum, buns, butt, buttocks, can, derriere, fanny, fundament, hind end, hindquarters, keister, nates, posterior, prat, rear, rear end, rump, seat, stern, tail, tail end, tooshie, tush |
| (noun) the lower side of anything | Synonyms: underside, undersurface |
| (noun) the lowest part of anything | - |
| (noun) a depression forming the ground under a body of water | Synonyms: bed |
| (noun) low-lying alluvial land near a river | Synonyms: bottomland |
| (noun) the second half of an inning; while the home team is at bat | Synonyms: bottom of the inning |
| bottomland | (noun) low-lying alluvial land near a river | Synonyms: bottom |
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| bottomlessness | (noun) the property of being very deep; without limit | - |
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| 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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| botulinum | (noun) anaerobic bacterium producing botulin the toxin that causes botulism | Synonyms: botulinus, Clostridium botulinum |
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| botulinus | (noun) anaerobic bacterium producing botulin the toxin that causes botulism | Synonyms: botulinum, Clostridium botulinum |
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| botulism | (noun) food poisoning from ingesting botulin; not infectious; affects the CNS; can be fatal if not treated promptly | - |
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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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| bouchee | (noun) shell of puff paste | Synonyms: patty shell |
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| boucle | (noun) a fabric of uneven yarn that has an uneven knobby effect | - |
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| boudoir | (noun) a lady's bedroom or private sitting room | - |
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