| craniometer | (noun) an instrument for measuring skull sizes | - |
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| crapper | (noun) a plumbing fixture for defecation and urination | Synonyms: can, commode, pot, potty, stool, throne, toilet |
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| crapshooter | (noun) a gambler who plays the game of craps | - |
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| crasher | (noun) someone who gets in (to a party) without an invitation or without paying | Synonyms: gatecrasher, unwelcome guest |
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| crater | (noun) a bowl-shaped depression formed by the impact of a meteorite or bomb | - |
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| (noun) a bowl-shaped geological formation at the top of a volcano | Synonyms: volcanic crater |
| crawler | (noun) terrestrial worm that burrows into and helps aerate soil; often surfaces when the ground is cool or wet; used as bait by anglers | Synonyms: angleworm, dew worm, earthworm, fishing worm, fishworm, nightcrawler, nightwalker, red worm, wiggler |
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| (noun) a person who tries to please someone in order to gain a personal advantage | Synonyms: ass-kisser, lackey, sycophant, toady |
| (noun) a person who crawls or creeps along the ground | Synonyms: creeper |
| crayer | (noun) a two- or three-masted sailing vessel formerly used for transporting cargo in the Baltic Sea. | - |
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| creamer | (noun) a small pitcher for serving cream | Synonyms: cream pitcher |
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| creeper | (noun) any of various small insectivorous birds of the Northern Hemisphere that climb up a tree trunk supporting themselves on stiff tail feathers and their feet | Synonyms: tree creeper |
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| (noun) a person who crawls or creeps along the ground | Synonyms: crawler |
| (noun) any plant (as ivy or periwinkle) that grows by creeping | - |
| cricketer | (noun) an athlete who plays cricket | - |
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| crier | (noun) (formerly) an official who made public announcements | Synonyms: town crier |
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| (noun) a person who weeps | Synonyms: weeper |
| (noun) a peddler who shouts to advertise the goods he sells | - |
| crimper | (noun) a mechanical device consisting of a cylindrical tube around which the hair is wound to curl it | Synonyms: curler, hair curler, roller |
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| (noun) a hand tool used for joining two pieces of metal or other ductile material (usually a wire and a metal plate) by deforming one or both of them to hold the other. | Synonyms: crimping pliers |
| (noun) someone who tricks or coerces men into service as sailors or soldiers | Synonyms: crimp |
| critter | (noun) a regional term for `creature' (especially for domestic animals) | - |
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| croaker | (noun) any of several fishes that make a croaking noise | - |
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| (noun) the lean flesh of a saltwater fish caught along Atlantic coast of southern U.S. | - |
| crofter | (noun) an owner or tenant of a small farm in Great Britain | - |
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| crooner | (noun) a singer of popular ballads | Synonyms: balladeer |
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| cropper | (noun) small farmers and tenants | Synonyms: sharecrop farmer, sharecropper |
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| crosier | (noun) a staff surmounted by a crook or cross carried by bishops as a symbol of pastoral office | Synonyms: crozier |
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| crossbencher | (noun) a member of the House of Commons who does not vote regularly with either the government or the Opposition | - |
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| crossover | (noun) a path (often marked) where something (as a street or railroad) can be crossed to get from one side to the other | Synonyms: crossing, crosswalk |
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| (noun) the appropriation of a new style (especially in popular music) by combining elements of different genres in order to appeal to a wider audience | - |
| (noun) a voter who is registered as a member of one political party but who votes in the primary of another party | Synonyms: crossover voter |
| (noun) the interchange of sections between pairing homologous chromosomes during the prophase of meiosis | Synonyms: crossing over |
| croupier | (noun) someone who collects and pays bets at a gaming table | - |
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| crozier | (noun) a staff surmounted by a crook or cross carried by bishops as a symbol of pastoral office | Synonyms: crosier |
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| crucifer | (noun) any of various plants of the family Cruciferae | Synonyms: cruciferous plant |
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| cruiser | (noun) a large fast warship; smaller than a battleship and larger than a destroyer | - |
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| (noun) a large motorboat that has a cabin and plumbing and other conveniences necessary for living on board | Synonyms: cabin cruiser, pleasure boat, pleasure craft |
| (noun) a car in which policemen cruise the streets; equipped with radiotelephonic communications to headquarters | Synonyms: patrol car, police car, police cruiser, prowl car, squad car |
| cruller | (noun) small friedcake formed into twisted strips and fried; richer than doughnuts | Synonyms: twister |
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| crupper | (noun) a strap from the back of a saddle passing under the horse's tail; prevents saddle from slipping forward | - |
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| crusader | (noun) a disputant who advocates reform | Synonyms: meliorist, reformer, reformist, social reformer |
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| crusher | (noun) a device that crushes something | - |
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| cryometer | (noun) a thermometer designed to measure low temperatures | - |
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| cryptographer | (noun) decoder skilled in the analysis of codes and cryptograms | Synonyms: cryptanalyst, cryptologist |
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| crystallographer | (noun) a specialist in crystallography | - |
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| cuckooflower | (noun) a bitter cress of Europe and America | Synonyms: Cardamine pratensis, cuckoo flower, lady's smock, meadow cress |
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| cucumber | (noun) cylindrical green fruit with thin green rind and white flesh eaten as a vegetable; related to melons | Synonyms: cuke |
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| (noun) a melon vine of the genus Cucumis; cultivated from earliest times for its cylindrical green fruit | Synonyms: cucumber vine, Cucumis sativus |
| cuirassier | (noun) a cavalryman equipped with a cuirass | - |
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| cullender | (noun) bowl-shaped strainer; used to wash or drain foods | Synonyms: colander |
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| cumber | (verb) restrict (someone or something) so as to make free movement difficult | Synonyms: encumber, restrain |
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| cunner | (noun) common in north Atlantic coastal waters of the United States | Synonyms: bergall, Tautogolabrus adspersus |
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| cupbearer | (noun) the attendant (usually an officer of a nobleman's household) whose duty is to fill and serve cups of wine | - |
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| cupflower | (noun) any of various plants of the genus Nierembergia having upturned bell-shaped flowers | Synonyms: nierembergia |
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| (noun) Mexican evergreen climbing plant having large solitary funnel-shaped fragrant yellow flowers with purple-brown ridges in the throat | Synonyms: chalice vine, Solandra guttata, trumpet flower |
| cupper | (noun) a cup of tea | Synonyms: cuppa |
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| curler | (noun) a mechanical device consisting of a cylindrical tube around which the hair is wound to curl it | Synonyms: crimper, hair curler, roller |
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| currier | (noun) a craftsman who curries leather for use | - |
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| customer | (noun) someone who pays for goods or services | Synonyms: client |
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| cutler | (noun) a dealer in cutlery | - |
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| cutter | (noun) a cutting implement; a tool for cutting | Synonyms: cutlery, cutting tool |
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| (noun) a boat for communication between ship and shore | Synonyms: pinnace, ship's boat, tender |
| (noun) a sailing vessel with a single mast set further back than the mast of a sloop | - |
| (noun) someone whose work is cutting (as e.g. cutting cloth for garments) | - |
| (noun) someone who carves the meat | Synonyms: carver |
| (noun) someone who cuts or carves stone | Synonyms: stonecutter |
| cyder | (noun) a beverage made from juice pressed from apples | Synonyms: cider |
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| cylinder | (noun) a cylindrical container for oxygen or compressed air | - |
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| (noun) a chamber within which piston moves | Synonyms: piston chamber |
| (noun) a surface generated by rotating a parallel line around a fixed line | - |
| (noun) a solid bounded by a cylindrical surface and two parallel planes (the bases) | - |
| cypher | (noun) a secret method of writing | Synonyms: cipher, cryptograph, secret code |
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| (noun) a message written in a secret code | Synonyms: cipher |
| (noun) a person of no influence | Synonyms: cipher, nobody, nonentity |
| (noun) a quantity of no importance; thing (object:), singular, negative pronoun; pronoun, thing, singular; quantifier: negative existential | Synonyms: aught, cipher, goose egg, nada, naught, nil, nix, nothing, null, zero, zilch, zip, zippo |
| (noun) a mathematical element that when added to another number yields the same number | Synonyms: 0, cipher, nought, zero |
| (verb) make a mathematical calculation or computation | Synonyms: calculate, cipher, compute, figure, reckon, work out |
| (verb) convert ordinary language into code | Synonyms: cipher, code, encipher, encrypt, inscribe, write in code |
| cytophotometer | (noun) a photometer that can be used to locate and identify chemical compounds in a cell by measuring the intensity of the light that passes through stained sections of the cytoplasm | - |
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| dabbler | (noun) any of numerous shallow-water ducks that feed by upending and dabbling | Synonyms: dabbling duck |
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| (noun) an amateur who engages in an activity without serious intentions and who pretends to have knowledge | Synonyms: dilettante, sciolist |
| dagger | (noun) a short knife with a pointed blade used for piercing or stabbing | Synonyms: sticker |
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| (noun) a character used in printing to indicate a second cross reference or footnote when the asterisk has already been used | Synonyms: obelisk |
| dallier | (noun) someone who wastes time | Synonyms: dilly-dallier, dillydallier, lounger, mope |
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| dampener | (noun) a device that dampens or moistens something | Synonyms: moistener |
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| damper | (noun) a depressing restraint | - |
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| (noun) a device that decreases the amplitude of electronic, mechanical, acoustical, or aerodynamic oscillations | Synonyms: muffler |
| (noun) a movable iron plate that regulates the draft in a stove or chimney or furnace | - |
| dancer | (noun) a performer who dances professionally | Synonyms: professional dancer, terpsichorean |
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| (noun) a person who participates in a social gathering arranged for dancing (as a ball) | Synonyms: social dancer |
| dander | (noun) a feeling of anger and animosity | Synonyms: hackles |
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| (noun) small scales from animal skins or hair or bird feathers that can cause allergic reactions in some people | - |
| danger | (noun) a venture undertaken without regard to possible loss or injury | Synonyms: peril, risk |
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| (noun) a dangerous place | - |
| (noun) the condition of being susceptible to harm or injury | - |
| (noun) a cause of pain or injury or loss | - |
| dapper | (adjective) marked by up-to-dateness in dress and manners | Synonyms: dashing, jaunty, natty, raffish, rakish, snappy, spiffy, spruce |
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| darner | (noun) a person who mends by darning | - |
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| darter | (noun) a person or other animal that moves abruptly and rapidly | - |
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| (noun) fish-eating bird of warm inland waters having a long flexible neck and slender sharp-pointed bill | Synonyms: anhinga, snakebird |
| dasymeter | (noun) densimeter consisting of a thin glass globe that is weighed in a gas to determine its density | - |
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| dauber | (noun) an unskilled painter | - |
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| daughter | (noun) a female human offspring | Synonyms: girl |
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| dawdler | (noun) someone who takes more time than necessary; someone who lags behind | Synonyms: drone, laggard, lagger, poke, trailer |
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| daydreamer | (noun) someone who indulges in idle or absentminded daydreaming | Synonyms: woolgatherer |
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| dayflower | (noun) any plant of the family Commelinaceae | Synonyms: spiderwort |
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| dealer | (noun) a firm engaged in trading | - |
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| (noun) a seller of illicit goods | - |
| (noun) the person who distributes the playing cards in a card game | - |
| (noun) someone who purchases and maintains an inventory of goods to be sold | Synonyms: bargainer, monger, trader |
| (noun) the major party to a financial transaction at a stock exchange; buys and sells for his own account | Synonyms: principal |
| debaser | (noun) a person who lowers the quality or character or value (as by adding cheaper metal to coins) | Synonyms: degrader |
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| debater | (noun) someone who engages in debate | Synonyms: arguer |
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| debaucher | (noun) someone who assaults others sexually | Synonyms: ravisher, violator |
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| debugger | (noun) a program that helps in locating and correcting programming errors | - |
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| decaliter | (noun) a metric unit of volume or capacity equal to 10 liters | Synonyms: dal, decalitre, dekaliter, dekalitre, dkl |
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| decameter | (noun) a metric unit of length equal to ten meters | Synonyms: dam, decametre, dekameter, dekametre, dkm |
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| decanter | (noun) a bottle with a stopper; for serving wine or water | Synonyms: carafe |
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| deceiver | (noun) someone who leads you to believe something that is not true | Synonyms: beguiler, cheat, cheater, slicker, trickster |
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| deciliter | (noun) a metric unit of volume equal to one tenth of a liter | Synonyms: decilitre, dl |
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| decimeter | (noun) a metric unit of length equal to one tenth of a meter | Synonyms: decimetre, dm |
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| decipher | (verb) read with difficulty | Synonyms: trace |
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| (verb) convert code into ordinary language | Synonyms: decode, decrypt |
| decipherer | (noun) a reader capable of reading and interpreting illegible or obscure text | - |
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| (noun) the kind of intellectual who converts messages from a code to plain text | Synonyms: decoder |
| decker | (noun) (often used in combinations) something constructed with multiple levels | - |
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| declarer | (noun) the bridge player in contract bridge who wins the bidding and can declare which suit is to be trumps | Synonyms: contractor |
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| (noun) someone who claims to speak the truth | Synonyms: affirmer, asserter, asseverator, avower |
| declinometer | (noun) an instrument for measuring magnetic declination | Synonyms: transit declinometer |
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| decoder | (noun) a machine that converts a coded text into ordinary language | - |
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| (noun) the kind of intellectual who converts messages from a code to plain text | Synonyms: decipherer |
| deer | (noun) distinguished from Bovidae by the male's having solid deciduous antlers | Synonyms: cervid |
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| deerstalker | (noun) a tight-fitting hat with visors front and back; formerly worn by hunters | - |
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| defamer | (noun) one who attacks the reputation of another by slander or libel | Synonyms: backbiter, libeler, maligner, slanderer, traducer, vilifier |
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| defaulter | (noun) a contestant who forfeits a match | - |
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| (noun) someone who fails to meet a financial obligation | Synonyms: deadbeat |
| (noun) someone who fails to make a required appearance in court | - |
| defender | (noun) a person who cares for persons or property | Synonyms: guardian, protector, shielder |
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| (noun) a fighter who holds out against attack | Synonyms: withstander |
| defer | (verb) yield to another's wish or opinion | Synonyms: accede, bow, give in, submit |
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| (verb) hold back to a later time | Synonyms: hold over, postpone, prorogue, put off, put over, remit, set back, shelve, table |
| defiler | (noun) a person or organization that causes pollution of the environment | Synonyms: polluter |
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| deflower | (verb) make imperfect | Synonyms: impair, mar, spoil, vitiate |
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| (verb) deprive of virginity | Synonyms: ruin |
| defrauder | (noun) a person who swindles you by means of deception or fraud | Synonyms: chiseler, chiseller, gouger, grifter, scammer, swindler |
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| defroster | (noun) heater that removes ice or frost (as from a windshield or a refrigerator or the wings of an airplane) | Synonyms: deicer |
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| degrader | (noun) a person who lowers the quality or character or value (as by adding cheaper metal to coins) | Synonyms: debaser |
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| degreaser | (noun) a chemical substance that dissolves water-insoluble substances, such as greases and oils. | - |
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| dehumidifier | (noun) an appliance to extract moisture from the air and make the environment more comfortable | - |
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| deicer | (noun) heater that removes ice or frost (as from a windshield or a refrigerator or the wings of an airplane) | Synonyms: defroster |
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| dejeuner | (noun) a midday meal | Synonyms: lunch, luncheon, tiffin |
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| dekaliter | (noun) a metric unit of volume or capacity equal to 10 liters | Synonyms: dal, decaliter, decalitre, dekalitre, dkl |
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| dekameter | (noun) a metric unit of length equal to ten meters | Synonyms: dam, decameter, decametre, dekametre, dkm |
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