| blowhard | (noun) a very boastful and talkative person | Synonyms: boaster, braggart, bragger, line-shooter, vaunter |
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| bluebird | (noun) blue North American songbird | - |
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| (noun) fruit-eating mostly brilliant blue songbird of the East Indies | Synonyms: fairy bluebird |
| board | (noun) a flat piece of material designed for a special purpose | - |
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| (noun) a table at which meals are served | Synonyms: dining table |
| (noun) electrical device consisting of a flat insulated surface that contains switches and dials and meters for controlling other electrical devices | Synonyms: control board, control panel, instrument panel, panel |
| (noun) a vertical surface on which information can be displayed to public view | Synonyms: display board, display panel |
| (noun) a printed circuit that can be inserted into expansion slots in a computer to increase the computer's capabilities | Synonyms: add-in, card, circuit board, circuit card, plug-in |
| (noun) a flat portable surface (usually rectangular) designed for board games | Synonyms: gameboard |
| (noun) food or meals in general | Synonyms: table |
| (noun) a committee having supervisory powers | - |
| (noun) a stout length of sawn timber; made in a wide variety of sizes and used for many purposes | Synonyms: plank |
| (verb) provide food and lodging (for) | - |
| (verb) lodge and take meals (at) | - |
| (verb) get on board of (trains, buses, ships, aircraft, etc.) | Synonyms: get on |
| (verb) live and take one's meals at or in | Synonyms: room |
| boarder | (noun) a tenant in someone's house | Synonyms: lodger, roomer |
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| (noun) a pupil who lives at school during term time | - |
| (noun) someone who forces their way aboard ship | - |
| boarding | (noun) the act of passengers and crew getting aboard a ship or aircraft | Synonyms: embarkation, embarkment |
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| (noun) a structure of boards | - |
| boardinghouse | (noun) a private house that provides accommodations and meals for paying guests | Synonyms: boarding house |
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| boardroom | (noun) a room where a committee meets (such as the board of directors of a company) | Synonyms: council chamber |
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| boards | (noun) (used in the plural) the boarding that surrounds an ice hockey rink | - |
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| (noun) (used in the plural) the stage of a theater | - |
| boardwalk | (noun) a walkway made of wooden boards; usually at seaside | - |
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| boatyard | (noun) a place where boats are built or maintained or stored | - |
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| bodyguard | (noun) a group of men who escort and protect some important person | - |
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| (noun) someone who escorts and protects a prominent person | Synonyms: escort |
| bollard | (noun) a strong post (as on a wharf or quay or ship for attaching mooring lines) | Synonyms: bitt |
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| bombard | (noun) a large shawm; the bass member of the shawm family | Synonyms: bombardon |
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| (verb) direct high energy particles or radiation against | - |
| (verb) address with continuously or persistently, as if with a barrage | Synonyms: barrage |
| (verb) throw bombs at or attack with bombs | Synonyms: bomb |
| (verb) cast, hurl, or throw repeatedly with some missile | Synonyms: pelt |
| bombardier | (noun) the member of a bomber crew responsible for using the bombsight and releasing the bombs on the target | - |
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| (noun) a noncommissioned officer in the British artillery | - |
| bombardment | (noun) the heavy fire of artillery to saturate an area rather than hit a specific target | Synonyms: barrage, barrage fire, battery, shelling |
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| (noun) an attack by dropping bombs | Synonyms: bombing |
| (noun) the act (or an instance) of subjecting a body or substance to the impact of high-energy particles (as electrons or alpha rays) | - |
| (noun) the rapid and continuous delivery of linguistic communication (spoken or written) | Synonyms: barrage, onslaught, outpouring |
| 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 |
| 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 |
| (verb) lie adjacent to another or share a boundary | Synonyms: abut, adjoin, butt, butt against, butt on, edge, march |
| (verb) extend on all sides of simultaneously; encircle | Synonyms: environ, ring, skirt, surround |
| (verb) enclose in or as if in a frame | Synonyms: frame, frame in |
| (verb) provide with a border or edge | Synonyms: edge |
| (verb) form the boundary of; be contiguous to | Synonyms: bound |
| bordered | (adjective) having a border especially of a specified kind; sometimes used as a combining term | - |
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| 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 | (adjective) of questionable or minimal quality | Synonyms: marginal |
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| (noun) a line that indicates a boundary | Synonyms: border, boundary line, delimitation, mete |
| boulevard | (noun) a wide street or thoroughfare | Synonyms: avenue |
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| boulevardier | (noun) a visitor of a city boulevard (especially in Paris) | - |
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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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| bowerbird | (noun) any of various birds of the Australian region whose males build ornamented structures resembling bowers in order to attract females | Synonyms: catbird |
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| bradycardia | (noun) abnormally slow heartbeat | - |
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| brassard | (noun) armor plate that protects the arm | - |
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| breadboard | (noun) a wooden or plastic board on which dough is kneaded or bread is sliced | Synonyms: bread board |
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| briard | (noun) old French breed of large strong usually black dogs having a long tail and long wavy and slightly stiff coat | - |
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| brickyard | (noun) a place where bricks are made and sold | Synonyms: brickfield |
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| broadsword | (noun) a sword with a broad blade and (usually) two cutting edges; used to cut rather than stab | - |
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| buckboard | (noun) an open horse-drawn carriage with four wheels; has a seat attached to a flexible board between the two axles | - |
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| buirdly | (adjective) muscular and heavily built | Synonyms: beefy, burly, husky, strapping |
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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 |
| burdened | (adjective) bearing a heavy burden of work or difficulties or responsibilities | - |
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| (adjective) bearing a physically heavy weight or load | Synonyms: heavy-laden, loaded down |
| burdenless | (adjective) not encumbered with a physical burden or load | Synonyms: unburdened |
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| burdensome | (adjective) not easily borne; wearing | Synonyms: onerous, taxing |
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| burdensomeness | (noun) unwelcome burdensome difficulty | Synonyms: heaviness, onerousness, oppressiveness |
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| burdock | (noun) any of several erect biennial herbs of temperate Eurasia having stout taproots and producing burs | Synonyms: clotbur |
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| bustard | (noun) large heavy-bodied chiefly terrestrial game bird capable of powerful swift flight; classified with wading birds but frequents grassy steppes | - |
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| butcherbird | (noun) shrikes that impale their prey on thorns | - |
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| (noun) large carnivorous Australian bird with the shrike-like habit of impaling prey on thorns | - |
| buzzard | (noun) a New World vulture that is common in South America and Central America and the southern United States | Synonyms: Cathartes aura, turkey buzzard, turkey vulture |
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| (noun) the common European short-winged hawk | Synonyms: Buteo buteo |
| buzzword | (noun) stock phrases that have become nonsense through endless repetition | Synonyms: cant |
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| byword | (noun) a condensed but memorable saying embodying some important fact of experience that is taken as true by many people | Synonyms: adage, proverb, saw |
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| camcorder | (noun) a portable television camera and videocassette recorder | - |
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| camelopard | (noun) tallest living quadruped; having a spotted coat and small horns and very long neck and legs; of savannahs of tropical Africa | Synonyms: Giraffa camelopardalis, giraffe |
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| canard | (noun) a deliberately misleading fabrication | - |
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| card | (noun) one of a set of small pieces of stiff paper marked in various ways and used for playing games or for telling fortunes | - |
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| (noun) a printed circuit that can be inserted into expansion slots in a computer to increase the computer's capabilities | Synonyms: add-in, board, circuit board, circuit card, plug-in |
| (noun) a rectangular piece of stiff paper used to send messages (may have printed greetings or pictures) | - |
| (noun) a card certifying the identity of the bearer | Synonyms: identity card |
| (noun) a sign posted in a public place as an advertisement | Synonyms: bill, notice, placard, poster, posting |
| (noun) (baseball) a list of batters in the order in which they will bat | Synonyms: batting order, lineup |
| (noun) a printed or written greeting that is left to indicate that you have visited | Synonyms: calling card, visiting card |
| (noun) a list of dishes available at a restaurant | Synonyms: bill of fare, carte, carte du jour, menu |
| (noun) (golf) a record of scores (as in golf) | Synonyms: scorecard |
| (noun) a witty amusing person who makes jokes | Synonyms: wag, wit |
| (noun) thin cardboard, usually rectangular | - |
| (verb) ask someone for identification to determine whether he or she is old enough to consume liquor | - |
| (verb) separate the fibers of | Synonyms: tease |
| cardamom | (noun) aromatic seeds used as seasoning like cinnamon and cloves especially in pickles and barbecue sauces | Synonyms: cardamon, cardamum |
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| (noun) rhizomatous herb of India having aromatic seeds used as seasoning | Synonyms: cardamon, Elettaria cardamomum |
| cardamon | (noun) aromatic seeds used as seasoning like cinnamon and cloves especially in pickles and barbecue sauces | Synonyms: cardamom, cardamum |
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| (noun) rhizomatous herb of India having aromatic seeds used as seasoning | Synonyms: cardamom, Elettaria cardamomum |
| cardamum | (noun) aromatic seeds used as seasoning like cinnamon and cloves especially in pickles and barbecue sauces | Synonyms: cardamom, cardamon |
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| cardboard | (adjective) without substance | Synonyms: unlifelike |
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| (noun) a stiff moderately thick paper | Synonyms: composition board |
| cardcase | (noun) a small case for carrying business cards | - |
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| cardcastle | (noun) an unstable construction with playing cards | Synonyms: card-house, cardhouse, house of cards |
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| cardholder | (noun) a player who holds a card or cards in a card game | - |
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| (noun) a person who holds a credit card or debit card | - |
| cardhouse | (noun) an unstable construction with playing cards | Synonyms: card-house, cardcastle, house of cards |
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| cardia | (noun) the opening into the stomach and that part of the stomach connected to the esophagus | - |
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| cardiac | (adjective) of or relating to the heart | - |
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| cardigan | (noun) knitted jacket that is fastened up the front with buttons or a zipper | - |
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| cardinal | (adjective) being or denoting a numerical quantity but not order | - |
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| (adjective) serving as an essential component | Synonyms: central, fundamental, key, primal |
| (noun) crested thick-billed North American finch having bright red plumage in the male | Synonyms: cardinal grosbeak, Cardinalis cardinalis, redbird, Richmondena Cardinalis |
| (noun) a variable color averaging a vivid red | Synonyms: carmine |
| (noun) (Roman Catholic Church) one of a group of more than 100 prominent bishops in the Sacred College who advise the Pope and elect new Popes | - |
| (noun) the number of elements in a mathematical set; denotes a quantity but not the order | Synonyms: cardinal number |
| cardinalate | (noun) the office of cardinal | Synonyms: cardinalship |
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| (noun) (Roman Catholic Church) the body of all cardinals of the church; elects and advises the pope | Synonyms: College of Cardinals, Sacred College, Sacred College of Cardinals |
| cardinalfish | (noun) small red fishes of coral reefs and inshore tropical waters | - |
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| cardinality | (noun) (mathematics) the number of elements in a set or group (considered as a property of that grouping) | - |
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| cardinalship | (noun) the office of cardinal | Synonyms: cardinalate |
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| cardiogram | (noun) a graphical recording of the cardiac cycle produced by an electrocardiograph | Synonyms: ECG, EKG, electrocardiogram |
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| cardiograph | (noun) medical instrument that records electric currents associated with contractions of the heart | Synonyms: electrocardiograph |
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| (noun) a medical instrument that measures the mechanical force of cardiac contractions and the amount of blood passing through the heart during a specified period by measuring the recoil of the body as blood is pumped from the ventricles | Synonyms: ballistocardiograph |
| cardiographic | (adjective) of or relating to a cardiograph | - |
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| cardiography | (noun) diagnostic procedure consisting of recording the activity of the heart electronically with a cardiograph (and producing a cardiogram) | Synonyms: electrocardiography |
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| cardioid | (noun) an epicycloid in which the rolling circle equals the fixed circle | - |
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| cardiologic | (adjective) of or relating to or used in or practicing cardiology | - |
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| cardiologist | (noun) a specialist in cardiology; a specialist in the structure and function and disorders of the heart | Synonyms: heart specialist, heart surgeon |
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| cardiology | (noun) the branch of medicine dealing with the heart and its diseases | - |
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| cardiomegaly | (noun) an abnormal enlargement of the heart | Synonyms: enlarged heart, megacardia, megalocardia |
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| cardiomyopathy | (noun) a disorder (usually of unknown origin) of the heart muscle (myocardium) | Synonyms: myocardiopathy |
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| cardiopathy | (noun) a disease of the heart | Synonyms: heart disease |
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| cardiopulmonary | (adjective) of or pertaining to or affecting both the heart and the lungs and their functions | Synonyms: cardiorespiratory |
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| cardiorespiratory | (adjective) of or pertaining to or affecting both the heart and the lungs and their functions | Synonyms: cardiopulmonary |
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| cardiospasm | (noun) a spasm of the cardiac sphincter (between the esophagus and the stomach); if the cardiac sphincter does not relax during swallowing the passage of food into the stomach is obstructed | - |
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| cardiovascular | (adjective) of or pertaining to or involving the heart and blood vessels | - |
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| carditis | (noun) inflammation of the heart | - |
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| cardoon | (noun) only parts eaten are roots and especially stalks (blanched and used as celery); related to artichokes | - |
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| (noun) southern European plant having spiny leaves and purple flowers cultivated for its edible leafstalks and roots | Synonyms: Cynara cardunculus |
| cardroom | (noun) a room for gambling on card games | - |
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| cards | (noun) a game played with playing cards | Synonyms: card game |
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| cardsharp | (noun) a professional card player who makes a living by cheating at card games | Synonyms: card shark, card sharp, card sharper, cardsharper, sharper, sharpie, sharpy |
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| cardsharper | (noun) a professional card player who makes a living by cheating at card games | Synonyms: card shark, card sharp, card sharper, cardsharp, sharper, sharpie, sharpy |
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| cashcard | (noun) a payment card that entitles the holder to receive cash | Synonyms: cash card |
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| catbird | (noun) North American songbird whose call resembles a cat's mewing | Synonyms: Dumetella carolinensis, gray catbird, grey catbird |
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| (noun) any of various birds of the Australian region whose males build ornamented structures resembling bowers in order to attract females | Synonyms: bowerbird |
| catchword | (noun) a favorite saying of a group, organization or individual | Synonyms: motto, shibboleth, slogan |
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| (noun) a word printed at the top of the page of a dictionary or other reference book to indicate the first or last item on that page | Synonyms: guide word, guideword |
| cedarbird | (noun) widely distributed over temperate North America | Synonyms: Bombycilla cedrorun, cedar waxwing |
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| centerboard | (noun) a retractable fin keel used on sailboats to prevent drifting to leeward | Synonyms: centreboard, drop keel, sliding keel |
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| centreboard | (noun) a retractable fin keel used on sailboats to prevent drifting to leeward | Synonyms: centerboard, drop keel, sliding keel |
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| cephalochordate | (noun) fish-like animals having a notochord rather than a true spinal column | - |
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| chalkboard | (noun) sheet of slate; for writing with chalk | Synonyms: blackboard |
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| chard | (noun) long succulent whitish stalks with large green leaves | Synonyms: leaf beet, spinach beet, Swiss chard |
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| (noun) beet lacking swollen root; grown as a vegetable for its edible leaves and stalks | Synonyms: Beta vulgaris cicla, chard plant, leaf beet, spinach beet, Swiss chard |
| checkerboard | (noun) a board having 64 squares of two alternating colors | Synonyms: checker board, chequerboard |
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| cheeseboard | (noun) tray on which cheeses are served | Synonyms: cheese tray |
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| chequerboard | (noun) a board having 64 squares of two alternating colors | Synonyms: checker board, checkerboard |
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| chessboard | (noun) a checkerboard used to play chess | Synonyms: chess board |
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