| aniseikonia | (noun) visual defect in which the shape and size of an ocular image differ in the two eyes | - |
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| blackout | (noun) a momentary loss of consciousness | - |
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| (noun) partial or total loss of memory | Synonyms: amnesia, memory loss |
| (noun) the failure of electric power for a general region | - |
| (noun) darkness resulting from the extinction of lights (as in a city invisible to enemy aircraft) | Synonyms: brownout, dimout |
| (noun) a suspension of radio or tv broadcasting | - |
| breakout | (noun) an escape from jail | Synonyms: break, gaolbreak, jailbreak, prison-breaking, prisonbreak |
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| bunko | (noun) a swindle in which you cheat at gambling or persuade a person to buy worthless property | Synonyms: bunco, bunco game, bunko game, con, con game, confidence game, confidence trick, flimflam, hustle, sting |
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| checkout | (noun) the act of inspecting or verifying | Synonyms: check-out procedure, check |
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| (noun) a counter in a supermarket where you pay for your purchases | Synonyms: checkout counter |
| (noun) the latest time for vacating a hotel room | Synonyms: checkout time |
| cookout | (noun) an informal meal cooked and eaten outdoors | - |
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| cuckold | (noun) a man whose wife committed adultery | - |
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| cuckolding | (noun) A sexual act where a married person has sex with another person while their spouse watches | - |
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| cuckoldom | (noun) the state of a husband whose wife has committed adultery | - |
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| cuckoldry | (noun) the practice of making cuckolds; sexual conquests of married women | - |
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| cuckoo | (noun) any of numerous European and North American birds having pointed wings and a long tail | - |
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| (noun) a man who is a stupid incompetent fool | Synonyms: bozo, fathead, goof, goofball, goose, jackass, twat, zany |
| cuckooflower | (noun) a bitter cress of Europe and America | Synonyms: Cardamine pratensis, cuckoo flower, lady's smock, meadow cress |
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| cuckoopint | (noun) common European arum with lanceolate spathe and short purple spadix; emerges in early spring; source of a starch called arum | Synonyms: Arum maculatum, jack-in-the-pulpit, lords-and-ladies |
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| daikon | (noun) radish of Japan with a long hard durable root eaten raw or cooked | Synonyms: Japanese radish, radish, Raphanus sativus longipinnatus |
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| dakoit | (noun) a member of an armed gang of robbers | Synonyms: dacoit |
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| dakoity | (noun) robbery by a gang of armed dacoits | Synonyms: dacoity |
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| dekko | (noun) British slang for a look | - |
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| gecko | (noun) any of various small chiefly tropical and usually nocturnal insectivorous terrestrial lizards typically with immovable eyelids; completely harmless | - |
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| gingko | (noun) deciduous dioecious Chinese tree having fan-shaped leaves and fleshy yellow seeds; exists almost exclusively in cultivation especially as an ornamental street tree | Synonyms: ginkgo, Ginkgo biloba, maidenhair tree |
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| hexakosioihexekontahexaphobia | (noun) fear of magic properties of the number 666 | - |
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| hickory | (noun) American hardwood tree bearing edible nuts | Synonyms: hickory tree |
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| (noun) valuable tough heavy hardwood from various hickory trees | - |
| ikon | (noun) a visual representation (of an object or scene or person or abstraction) produced on a surface | Synonyms: icon, image, picture |
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| (noun) a conventional religious painting in oil on a small wooden panel; venerated in the Eastern Church | Synonyms: icon |
| kickoff | (noun) (football) a kick from the center of the field to start a football game or to resume it after a score | - |
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| (noun) a start given to contestants | Synonyms: send-off, start-off |
| (noun) the time at which something is supposed to begin | Synonyms: beginning, commencement, first, get-go, offset, outset, showtime, start, starting time |
| knockoff | (noun) an unauthorized copy or imitation | Synonyms: clone |
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| knockout | (noun) a blow that renders the opponent unconscious | Synonyms: kayo, KO |
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| (noun) a very attractive or seductive looking woman | Synonyms: beauty, dish, looker, lulu, mantrap, peach, ravisher, smasher, stunner, sweetheart |
| koala | (noun) sluggish tailless Australian arboreal marsupial with grey furry ears and coat; feeds on eucalyptus leaves and bark | Synonyms: kangaroo bear, koala bear, native bear, Phascolarctos cinereus |
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| koan | (noun) a paradoxical anecdote or a riddle that has no solution; used in Zen Buddhism to show the inadequacy of logical reasoning | - |
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| kob | (noun) an orange-brown antelope of southeast Africa | Synonyms: Kobus kob |
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| kobo | (noun) 100 kobos equal 1 naira in Nigeria | - |
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| kohl | (noun) a cosmetic preparation used by women in Egypt and Arabia to darken the edges of their eyelids | - |
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| kohleria | (noun) shrubby herb cultivated for their soft velvety foliage and showy scarlet flowers | - |
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| kohlrabi | (noun) fleshy turnip-shaped edible stem of the kohlrabi plant | Synonyms: turnip cabbage |
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| (noun) plant cultivated for its enlarged fleshy turnip-shaped edible stem | Synonyms: Brassica oleracea gongylodes |
| koine | (noun) a common language used by speakers of different languages | Synonyms: interlanguage, lingua franca |
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| koinonia | (noun) Christian fellowship or communion with God or with fellow Christians; said in particular of the early Christian community | - |
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| kola | (noun) tree bearing large brown nuts containing e.g. caffeine; source of cola extract | Synonyms: Cola acuminata, goora nut, kola nut, kola nut tree |
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| kolkhoz | (noun) a collective farm owned by the communist state | - |
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| kolkhoznik | (noun) a member of a kolkhoz | - |
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| komondor | (noun) Hungarian breed of large powerful shaggy-coated white dog; used also as guard dog | - |
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| konimeter | (noun) A konimeter is a device for measuring airborne dust concentration in which samples are obtained by sucking the air through a hole and allowing it to pass over a glass plate coated with grease on which the particles collect. | - |
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| konini | (noun) erect deciduous shrub or tree to 10 feet with maroon flowers; New Zealand | Synonyms: Fuchsia excorticata, native fuchsia, tree fuchsia |
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| koodoo | (noun) either of two spiral-horned antelopes of the African bush | Synonyms: koudou, kudu |
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| kook | (noun) someone regarded as eccentric or crazy and standing out from a group | Synonyms: odd fellow, odd fish, odd man out, queer bird, queer duck |
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| kookaburra | (noun) Australian kingfisher having a loud cackling cry | Synonyms: Dacelo gigas, laughing jackass |
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| kopeck | (noun) 100 kopecks equal 1 ruble in Russia | Synonyms: copeck, kopek |
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| kopek | (noun) 100 kopecks equal 1 ruble in Russia | Synonyms: copeck, kopeck |
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| kopiyka | (noun) 100 kopiykas equal 1 hryvnia in Ukraine | - |
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| kopje | (noun) a small hill rising up from the African veld | Synonyms: koppie |
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| koppie | (noun) a small hill rising up from the African veld | Synonyms: kopje |
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| kor | (noun) an ancient Hebrew unit of capacity equal to 10 baths or 10 ephahs | Synonyms: homer |
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| korlan | (noun) the fruit from the korlan tree. | - |
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| koruna | (noun) the basic unit of money in Czech Republic | - |
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| (noun) the basic unit of money in Slovakia | - |
| kos | (noun) (in India) a unit of length having different values in different localities | Synonyms: coss |
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| kosher | (noun) food that fulfills the requirements of Jewish dietary law | - |
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| kosherness | (noun) The property of being fit to eat under Jewish dietary laws. | - |
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| koto | (noun) Japanese stringed instrument that resembles a zither; has a rectangular wooden sounding board and usually 13 silk strings that are plucked with the fingers | - |
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| kotow | (noun) a former Chinese custom of touching the ground with the forehead as a sign of respect or submission | Synonyms: kowtow |
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| koudou | (noun) either of two spiral-horned antelopes of the African bush | Synonyms: koodoo, kudu |
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| koumiss | (noun) an alcoholic beverage made from fermented mare's milk; made originally by nomads of central Asia | Synonyms: kumis |
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| kowhai | (noun) shrub or small tree of New Zealand and Chile having pendulous racemes of tubular golden-yellow flowers; yields a hard strong wood | Synonyms: Sophora tetraptera |
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| kowtow | (noun) a former Chinese custom of touching the ground with the forehead as a sign of respect or submission | Synonyms: kotow |
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| kwashiorkor | (noun) severe malnutrition in children resulting from a diet excessively high in carbohydrates and low in protein | - |
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| leukocyte | (noun) blood cells that engulf and digest bacteria and fungi; an important part of the body's defense system | Synonyms: leucocyte, WBC, white blood cell, white blood corpuscle, white cell, white corpuscle |
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| leukocytosis | (noun) an abnormal increase in the number of white blood cells in the blood as a result of infection (as in leukemia) | Synonyms: leucocytosis |
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| leukoderma | (noun) a congenital skin condition characterized by spots or bands of unpigmented skin | - |
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| leukoencephalitis | (noun) inflammation of the white matter of the brain | - |
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| leukoma | (noun) eye disease consisting of an opaque white spot on the cornea | Synonyms: leucoma |
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| leukopenia | (noun) an abnormal lowering of the white blood cell count | Synonyms: leucopenia |
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| leukorrhea | (noun) discharge of white mucous material from the vagina; often an indication of infection | Synonyms: leucorrhea |
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| leukotomy | (noun) surgical interruption of nerve tracts to and from the frontal lobe of the brain; often results in marked cognitive and personality changes | Synonyms: frontal lobotomy, leucotomy, lobotomy, prefrontal leucotomy, prefrontal leukotomy, prefrontal lobotomy |
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| lockout | (noun) a management action resisting employee's demands; employees are barred from entering the workplace until they agree to terms | - |
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| lookout | (noun) the act of looking out | Synonyms: outlook |
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| (noun) a structure commanding a wide view of its surroundings | Synonyms: lookout station, observation tower, observatory |
| (noun) an elevated post affording a wide view | Synonyms: observation post |
| (noun) a person employed to keep watch for some anticipated event | Synonyms: lookout man, picket, scout, sentinel, sentry, spotter, watch |
| maikoa | (noun) a South American plant that is cultivated for its large fragrant trumpet-shaped flowers | Synonyms: angel's trumpet, Brugmansia arborea, Datura arborea |
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| mako | (noun) powerful mackerel shark of the Atlantic and Pacific | Synonyms: mako shark |
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| makomako | (noun) graceful deciduous shrub or small tree having attractive foliage and small red berries that turn black at maturity and are used for making wine | Synonyms: Aristotelia racemosa, Aristotelia serrata, New Zealand wine berry, wineberry |
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| misreckoning | (noun) a mistake in calculating | Synonyms: miscalculation, misestimation |
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| nameko | (noun) one of the most important fungi cultivated in Japan | Synonyms: Pholiota nameko, viscid mushroom |
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| onkos | (noun) A high ornate headdress worn by the performers of Greek tragedy. | - |
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| overreckoning | (noun) a calculation that results in an estimate that is too high | Synonyms: overestimate, overestimation, overrating |
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| pachinko | (noun) a Japanese pinball game played on a vertical board | - |
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| parkour | (noun) An athletic discipline, in which practitioners traverse any environment in the most efficient way possible using their physical abilities, and which commonly involves running, jumping, vaulting, rolling, and other similar physical movements. | - |
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| pekoe | (noun) a superior grade of black tea; grown in India and Sri Lanka and Java | Synonyms: orange pekoe |
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| pinko | (noun) a person with mildly leftist political views | Synonyms: pink |
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| reckoner | (noun) a handbook of tables used to facilitate computation | Synonyms: ready reckoner |
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| (noun) an expert at calculation (or at operating calculating machines) | Synonyms: calculator, computer, estimator, figurer |
| reckoning | (noun) the act of counting; reciting numbers in ascending order | Synonyms: count, counting, enumeration, numeration, tally |
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| (noun) problem solving that involves numbers or quantities | Synonyms: calculation, computation, figuring |
| (noun) a bill for an amount due | Synonyms: tally |
| shako | (noun) tall hat; worn by some British soldiers on ceremonial occasions | Synonyms: bearskin, busby |
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| staurikosaur | (noun) primitive dinosaur found in Brazil | Synonyms: staurikosaurus |
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| staurikosaurus | (noun) primitive dinosaur found in Brazil | Synonyms: staurikosaur |
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| syndetikon | (noun) Syndetikon is an all-purpose adhesive manufactured from natural materials. | - |
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| takoyaki | (noun) a ball-shaped Japanese snack made of a wheat flour-based batter and cooked in a special moulded pan | - |
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| turakoo | (noun) large brightly crested bird of Africa | Synonyms: touraco, turaco, turacou |
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| underreckoning | (noun) an estimation that is too low; an estimate that is less than the true or actual value | Synonyms: underestimate, underestimation, underrating |
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| wacko | (noun) a person who is regarded as eccentric or mad | Synonyms: nutter, whacko |
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| walkout | (noun) a strike in which the workers walk out | - |
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| (noun) the act of walking out (of a meeting or organization) as a sign of protest | - |
| walkover | (noun) any undertaking that is easy to do | Synonyms: breeze, child's play, cinch, duck soup, picnic, piece of cake, pushover, snap |
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| (noun) backbends combined with handstands | - |
| whacko | (noun) a person who is regarded as eccentric or mad | Synonyms: nutter, wacko |
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| workout | (noun) the activity of exerting your muscles in various ways to keep fit | Synonyms: exercise, exercising, physical exercise, physical exertion |
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