| barbital | (noun) a barbiturate used as a hypnotic | Synonyms: barbitone, diethylbarbituric acid, diethylmalonylurea, veronal |
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| barnful | (noun) the quantity that a barn will hold | - |
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| barrel | (noun) a cylindrical container that holds liquids | Synonyms: cask |
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| (noun) a tube through which a bullet travels when a gun is fired | Synonyms: gun barrel |
| (noun) any of various units of capacity | Synonyms: bbl |
| (noun) the quantity that a barrel (of any size) will hold | Synonyms: barrelful |
| (noun) a bulging cylindrical shape; hollow with flat ends | Synonyms: drum |
| barrelful | (noun) the quantity that a barrel (of any size) will hold | Synonyms: barrel |
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| barrowful | (noun) the quantity that a barrow will hold | Synonyms: barrow |
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| baseball | (noun) a ball game played with a bat and ball between two teams of nine players; teams take turns at bat trying to score runs | Synonyms: ball, baseball game |
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| (noun) a ball used in playing baseball | - |
| basil | (noun) leaves of the common basil; used fresh or dried | Synonyms: sweet basil |
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| (noun) any of several Old World tropical aromatic annual or perennial herbs of the genus Ocimum | - |
| basinful | (noun) the quantity that a basin will hold | Synonyms: basin |
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| basketball | (noun) a game played on a court by two opposing teams of 5 players; points are scored by throwing the ball through an elevated horizontal hoop | Synonyms: basketball game, hoops |
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| (noun) an inflated ball used in playing basketball | - |
| basketful | (noun) the quantity contained in a basket | Synonyms: basket |
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| basophil | (noun) a leukocyte with basophilic granules easily stained by basic stains | Synonyms: basophile |
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| bbl | (noun) any of various units of capacity | Synonyms: barrel |
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| beachball | (noun) large and light ball; for play at the seaside | Synonyms: beach ball |
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| beanball | (noun) a baseball deliberately thrown at the batter's head | Synonyms: beaner |
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| bechamel | (noun) milk thickened with a butter and flour roux | Synonyms: bechamel sauce, white sauce |
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| bedroll | (noun) bedding rolled up for carrying | - |
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| beigel | (noun) (Yiddish) glazed yeast-raised doughnut-shaped roll with hard crust | Synonyms: bagel |
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| bell | (noun) a hollow device made of metal that makes a ringing sound when struck | - |
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| (noun) a push button at an outer door that gives a ringing or buzzing signal when pushed | Synonyms: buzzer, doorbell |
| (noun) the flared opening of a tubular device | - |
| (noun) a percussion instrument consisting of a set of tuned bells that are struck with a hammer; used as an orchestral instrument | Synonyms: chime, gong |
| (noun) the sound of a bell being struck | Synonyms: toll |
| (noun) the shape of a bell | Synonyms: bell shape, campana |
| (noun) (nautical) each of the eight half-hour units of nautical time signaled by strokes of a ship's bell; eight bells signals 4:00, 8:00, or 12:00 o'clock, either a.m. or p.m. | Synonyms: ship's bell |
| bellpull | (noun) a handle or cord that is pulled to ring a doorbell or a servant's bell etc. | - |
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| bellyful | (noun) an undesirable overabundance | - |
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| benzol | (noun) a colorless liquid hydrocarbon; highly flammable; carcinogenic; the simplest of the aromatic compounds | Synonyms: benzene, benzine |
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| benzyl | (noun) the univalent radical derived from toluene | Synonyms: benzyl group, benzyl radical |
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| bergall | (noun) common in north Atlantic coastal waters of the United States | Synonyms: cunner, Tautogolabrus adspersus |
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| beryl | (noun) the chief source of beryllium; colored transparent varieties are valued as gems | - |
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| bestowal | (noun) the act of conferring an honor or presenting a gift | Synonyms: bestowment, conferment, conferral |
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| (noun) a gift that is bestowed or conferred | Synonyms: bestowment |
| betel | (noun) Asian pepper plant whose leaves are chewed with betel nut (seed of the betel palm) by southeast Asians | Synonyms: betel pepper, Piper betel |
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| (noun) a leaf of a vine from the betel pepper | Synonyms: betel leaf |
| bethel | (noun) a house of worship (especially one for sailors) | - |
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| betrayal | (noun) an act of deliberate betrayal | Synonyms: perfidy, treachery, treason |
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| (noun) the quality of aiding an enemy | - |
| betrothal | (noun) the act of becoming betrothed or engaged | Synonyms: espousal |
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| (noun) a mutual promise to marry | Synonyms: engagement, troth |
| bevel | (noun) a hand tool consisting of two rules that are hinged together so you can draw or measure angles of any size | Synonyms: bevel square |
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| (noun) two surfaces meeting at an angle different from 90 degrees | Synonyms: cant, chamfer |
| bezel | (noun) a sloping edge on a cutting tool | - |
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| bicentennial | (noun) the 200th anniversary (or the celebration of it) | Synonyms: bicentenary |
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| biennial | (noun) (botany) a plant having a life cycle that normally takes two seasons from germination to death to complete; flowering biennials usually bloom and fruit in the second season | - |
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| bilabial | (noun) a consonant that is articulated using both lips; /p/ or /b/ or /w/ | - |
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| bilingual | (noun) a person who speaks two languages fluently | Synonyms: bilingualist |
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| bill | (noun) the entertainment offered at a public presentation | - |
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| (noun) horny projecting mouth of a bird | Synonyms: beak, neb, nib, pecker |
| (noun) a brim that projects to the front to shade the eyes | Synonyms: eyeshade, peak, visor, vizor |
| (noun) a cutting tool with a sharp edge | Synonyms: billhook |
| (noun) a sign posted in a public place as an advertisement | Synonyms: card, notice, placard, poster, posting |
| (noun) an itemized statement of money owed for goods shipped or services rendered | Synonyms: account, invoice |
| (noun) an advertisement (usually printed on a page or in a leaflet) intended for wide distribution | Synonyms: broadsheet, broadside, circular, flier, flyer, handbill, throwaway |
| (noun) a statute in draft before it becomes law | Synonyms: measure |
| (noun) a list of particulars (as a playbill or bill of fare) | - |
| (noun) a piece of paper money (especially one issued by a central bank) | Synonyms: bank bill, bank note, banker's bill, banknote, Federal Reserve note, government note, greenback, note |
| bimetal | (noun) material made by bonding together sheets of two different metals | - |
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| binful | (noun) the quantity contained in a bin | Synonyms: bin |
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| binomial | (noun) (mathematics) a quantity expressed as a sum or difference of two terms; a polynomial with two terms | - |
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| birdcall | (noun) a device for imitating a birdcall | - |
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| (noun) the characteristic sound produced by a bird | Synonyms: birdsong, call, song |
| bisexual | (noun) a person who is sexually attracted to both sexes | Synonyms: bisexual person |
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| blackball | (noun) the act of excluding someone by a negative vote or veto | Synonyms: barring |
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| blackmail | (noun) extortion of money by threats to divulge discrediting information | - |
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| blackpoll | (noun) North American warbler having a black-and-white head | Synonyms: Dendroica striate |
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| blacktail | (noun) mule deer of western Rocky Mountains | Synonyms: black-tailed deer, blacktail deer, Odocoileus hemionus columbianus |
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| blastocoel | (noun) the fluid-filled cavity inside a blastula | Synonyms: blastocele, blastocoele, cleavage cavity, segmentation cavity |
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| blowball | (noun) any of several herbs of the genus Taraxacum having long tap roots and deeply notched leaves and bright yellow flowers followed by fluffy seed balls | Synonyms: dandelion |
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| bluebell | (noun) one of the most handsome prairie wildflowers having large erect bell-shaped bluish flowers; of moist places in prairies and fields from eastern Colorado and Nebraska south to New Mexico and Texas | Synonyms: Eustoma grandiflorum, prairie gentian, tulip gentian |
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| (noun) perennial of Northern Hemisphere with slender stems and bell-shaped blue flowers | Synonyms: Campanula rotundifolia, harebell |
| (noun) sometimes placed in genus Scilla | Synonyms: harebell, Hyacinthoides nonscripta, Scilla nonscripta, wild hyacinth, wood hyacinth |
| bluebill | (noun) diving ducks of North America having a bluish-grey bill | Synonyms: broadbill, scaup, scaup duck |
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| bluegill | (noun) important edible sunfish of eastern and central United States | Synonyms: Lepomis macrochirus |
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| boatbill | (noun) tropical American heron related to night herons | Synonyms: boat-billed heron, broadbill, Cochlearius cochlearius |
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| bobtail | (noun) a short or shortened tail of certain animals | Synonyms: bob, dock |
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| (noun) large sheepdog with a profuse shaggy bluish-grey-and-white coat and short tail; believed to trace back to the Roman occupation of Britain | Synonyms: Old English sheepdog |
| boil | (noun) the temperature at which a liquid boils at sea level | Synonyms: boiling point |
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| (noun) a painful sore with a hard core filled with pus | Synonyms: furuncle |
| boll | (noun) the rounded seed-bearing capsule of a cotton or flax plant | - |
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| bombshell | (noun) an explosive bomb or artillery shell | - |
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| (noun) a shocking surprise | Synonyms: thunderbolt, thunderclap |
| (noun) an entertainer who has a sensational effect | - |
| bonemeal | (noun) fertilizer made of ground bones | - |
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| bookstall | (noun) a shop where books are sold | Synonyms: bookshop, bookstore |
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| borstal | (noun) formerly a British reform school for youths considered too young to send to prison | - |
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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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| bottleful | (noun) the quantity contained in a bottle | Synonyms: bottle |
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| bowel | (noun) the part of the alimentary canal between the stomach and the anus | Synonyms: gut, intestine |
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| bowl | (noun) the act of rolling something (as the ball in bowling) | Synonyms: roll |
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| (noun) a dish that is round and open at the top for serving foods | - |
| (noun) a round vessel that is open at the top; used chiefly for holding grains or liquids | - |
| (noun) a small round container that is open at the top for holding tobacco | Synonyms: pipe bowl |
| (noun) a large structure for open-air sports or entertainments | Synonyms: arena, sports stadium, stadium |
| (noun) a wooden ball (with flattened sides so that it rolls on a curved course) used in the game of lawn bowling | - |
| (noun) a large ball with finger holes used in the sport of bowling | Synonyms: bowling ball |
| (noun) the quantity contained in a bowl | Synonyms: bowlful |
| (noun) a concave shape with an open top | Synonyms: trough |
| bowlful | (noun) the quantity contained in a bowl | Synonyms: bowl |
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| boxful | (noun) the quantity contained in a box | Synonyms: box |
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| bradawl | (noun) an awl for making small holes for brads or small screws | Synonyms: pricker |
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| brail | (noun) a small rope (one of several) used to draw a sail in | - |
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| (noun) a small net used to draw fish into a boat | - |
| brandyball | (noun) a British candy flavored with brandy | - |
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| brawl | (noun) a noisy fight in a crowd | Synonyms: free-for-all |
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| (noun) an uproarious party | Synonyms: bash, do |
| brazil | (noun) three-sided tropical American nut with white oily meat and hard brown shell | Synonyms: brazil nut |
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| bridal | (noun) archaic terms for a wedding or wedding feast | Synonyms: espousal |
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| brill | (noun) European food fish | Synonyms: Scophthalmus rhombus |
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| brinjal | (noun) hairy upright herb native to southeastern Asia but widely cultivated for its large glossy edible fruit commonly used as a vegetable | Synonyms: aubergine, eggplant, eggplant bush, garden egg, mad apple, Solanum melongena |
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| bristletail | (noun) small wingless insect with a long bristlelike tail | - |
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| broadbill | (noun) small birds of the Old World tropics having bright plumage and short wide bills | - |
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| (noun) freshwater duck of the Northern Hemisphere having a broad flat bill | Synonyms: Anas clypeata, shoveler, shoveller |
| (noun) diving ducks of North America having a bluish-grey bill | Synonyms: bluebill, scaup, scaup duck |
| (noun) tropical American heron related to night herons | Synonyms: boat-billed heron, boatbill, Cochlearius cochlearius |
| broadtail | (noun) hardy coarse-haired sheep of central Asia; lambs are valued for their soft curly black fur | Synonyms: caracul, karakul |
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| (noun) the fur of a very young karakul lamb | - |
| broil | (noun) cooking by direct exposure to radiant heat (as over a fire or under a grill) | Synonyms: broiling, grilling |
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| bromoil | (noun) a print made by the bromoil process having soft, paint-like qualities. | - |
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| brothel | (noun) a building where prostitutes are available | Synonyms: bagnio, bawdyhouse, bordello, cathouse, house of ill repute, house of prostitution, sporting house, whorehouse |
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| browntail | (noun) small brown and white European moth introduced into eastern United States; pest of various shade and fruit trees | Synonyms: brown-tail moth, Euproctis phaeorrhoea |
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| bucketful | (noun) the quantity contained in a bucket | Synonyms: bucket |
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| buckyball | (noun) a spheroidal fullerene; the first known example of a fullerene | Synonyms: buckminsterfullerene |
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| buhl | (noun) an inlaid furniture decoration; tortoiseshell and yellow and white metal form scrolls in cabinetwork | Synonyms: boule, boulle |
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| bulbil | (noun) small bulb or bulb-shaped growth arising from the leaf axil or in the place of flowers | Synonyms: bulblet |
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| bulbul | (noun) nightingale spoken of in Persian poetry | - |
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| bull | (noun) a serious and ludicrous blunder | - |
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| (noun) uncastrated adult male of domestic cattle | - |
| (noun) mature male of various mammals of which the female is called `cow'; e.g. whales or elephants or especially cattle | - |
| (noun) Obscene word for unacceptable behavior | Synonyms: bullshit, crap, dogshit, horseshit, Irish bull, shit |
| (noun) a formal proclamation issued by the pope (usually written in antiquated characters and sealed with a leaden bulla) | Synonyms: papal bull |
| (noun) the center of a target | Synonyms: bull's eye |
| (noun) uncomplimentary terms for a policeman | Synonyms: cop, copper, fuzz, pig |
| (noun) an investor with an optimistic market outlook; an investor who expects prices to rise and so buys now for resale later | - |
| (noun) a large and strong and heavyset man | Synonyms: bruiser, Samson, strapper |
| buntal | (noun) fine white Philippine fiber from stalks of unopened leaves of talipot palms; used in making hats | - |
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| burial | (noun) concealing something under the ground | Synonyms: burying |
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| (noun) the ritual placing of a corpse in a grave | Synonyms: entombment, inhumation, interment, sepulture |
| burl | (noun) soft lump or unevenness in a yarn; either an imperfection or created by design | Synonyms: knot, slub |
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| (noun) a large rounded outgrowth on the trunk or branch of a tree | - |
| (noun) the wood cut from a tree burl or outgrowth; often used decoratively in veneer | - |
| bushel | (noun) a British imperial capacity measure (liquid or dry) equal to 4 pecks | - |
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| (noun) a United States dry measure equal to 4 pecks or 2152.42 cubic inches | - |
| butanol | (noun) a flammable alcohol derived from butanes and used for solvents | Synonyms: butyl alcohol |
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| butterball | (noun) small North American diving duck; males have bushy head plumage | Synonyms: Bucephela albeola, bufflehead, dipper |
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| (noun) a rotund individual | Synonyms: fat person, fatso, fatty, roly-poly |
| butyl | (noun) a hydrocarbon radical (C4H9) | - |
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| cabal | (noun) a plot to carry out some harmful or illegal act (especially a political plot) | Synonyms: conspiracy |
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| (noun) a clique (often secret) that seeks power usually through intrigue | Synonyms: camarilla, faction, junto |
| cacodyl | (noun) the univalent group derived from arsine | Synonyms: arsenic group, cacodyl group, cacodyl radical |
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| (noun) a poisonous oily liquid with a garlicky odor composed of 2 cacodyl groups; undergoes spontaneous combustion in dry air | Synonyms: tetramethyldiarsine |
| calciferol | (noun) a fat-soluble vitamin that prevents rickets | Synonyms: cholecalciferol, D, ergocalciferol, viosterol, vitamin D |
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| call | (noun) (sports) the decision made by an umpire or referee | - |
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| (noun) a visit in an official or professional capacity | - |
| (noun) a brief social visit | - |
| (noun) the option to buy a given stock (or stock index or commodity future) at a given price before a given date | Synonyms: call option |
| (noun) a method of contacting a person by phone | Synonyms: phone call, telephone call |
| (noun) a loud utterance; often in protest or opposition | Synonyms: cry, outcry, shout, vociferation, yell |
| (noun) the characteristic sound produced by a bird | Synonyms: birdcall, birdsong, song |
| (noun) a request | - |
| (noun) a demand | Synonyms: claim |
| (noun) a demand for a show of hands in a card game | - |
| (noun) an instruction that interrupts the program being executed | - |
| (noun) a demand by a broker that a customer deposit enough to bring his margin up to the minimum requirement | Synonyms: margin call |
| calomel | (noun) a tasteless colorless powder used medicinally as a cathartic | Synonyms: mercurous chloride |
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| camail | (noun) a medieval hood of mail suspended from a basinet to protect the head and neck | Synonyms: aventail, ventail |
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| camel | (noun) cud-chewing mammal used as a draft or saddle animal in desert regions | - |
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| camgirl | (noun) a female performer who performs sexual acts by camera on the internet | - |
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