| alb | (noun) a white linen liturgical vestment with sleeves; worn by priests | - |
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| albacore | (noun) large pelagic tuna the source of most canned tuna; reaches 93 pounds and has long pectoral fins; found worldwide in tropical and temperate waters | Synonyms: long-fin tunny, Thunnus alalunga |
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| (noun) relatively small tuna with choice white flesh; major source of canned tuna | - |
| albatross | (noun) large web-footed birds of the Southern Hemisphere having long narrow wings; noted for powerful gliding flight | Synonyms: mollymawk |
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| (noun) (figurative) something that hinders or handicaps | Synonyms: millstone |
| albedo | (noun) the ratio of reflected to incident light | Synonyms: reflective power |
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| albinism | (noun) the congenital absence of pigmentation in the eyes and skin and hair | - |
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| albino | (noun) an animal with congenital albinism | - |
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| (noun) a person with congenital albinism: white hair and milky skin; eyes are usually pink | - |
| albite | (noun) a widely distributed feldspar that forms rocks | Synonyms: white feldspar |
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| albizia | (noun) any of numerous trees of the genus Albizia | Synonyms: albizzia |
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| albizzia | (noun) any of numerous trees of the genus Albizia | Synonyms: albizia |
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| albuca | (noun) any of various plants of the genus Albuca having large clusters of pale yellow flowers; South Africa | - |
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| albuginea | (noun) whitish tunic | - |
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| album | (noun) a book of blank pages with pockets or envelopes; for organizing photographs or stamp collections etc | - |
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| (noun) one or more recordings issued together; originally released on 12-inch phonograph records (usually with attractive record covers) and later on cassette audiotape and compact disc | Synonyms: record album |
| albumen | (noun) the white part of an egg; the nutritive and protective gelatinous substance surrounding the yolk consisting mainly of albumin dissolved in water | Synonyms: egg white, ovalbumin, white |
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| (noun) a simple water-soluble protein found in many animal tissues and liquids | Synonyms: albumin |
| albumin | (noun) a simple water-soluble protein found in many animal tissues and liquids | Synonyms: albumen |
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| albuminoid | (noun) a simple protein found in horny and cartilaginous tissues and in the lens of the eye | Synonyms: scleroprotein |
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| albuminuria | (noun) the presence of excessive protein (chiefly albumin but also globulin) in the urine; usually a symptom of kidney disorder | Synonyms: proteinuria |
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| albuterol | (noun) a bronchodilator (trade names Ventolin or Proventil) used for asthma and emphysema and other lung conditions; available in oral or inhalant forms; side effects are tachycardia and shakiness | Synonyms: Proventil, Ventolin |
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| alkylbenzene | (noun) organic compound that has an alkyl group bound to a benzene ring | - |
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| alkylbenzenesulfonate | (noun) sulfonate of alkyl benzene | - |
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| analbuminemia | (noun) an abnormally low level of albumin in the blood serum | - |
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| astilbe | (noun) any plant of the genus Astilbe having compound leaves and showy panicles of tiny colorful flowers | - |
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| balboa | (noun) the basic unit of money in Panama; equal to 100 centesimos | - |
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| balbriggan | (noun) a cotton knit fabric used for underwear | - |
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| bellbird | (noun) any of several tropical American birds of the genus Procnias having a bell-like call | - |
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| bellboy | (noun) someone employed as an errand boy and luggage carrier around hotels | Synonyms: bellhop, bellman |
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| bilberry | (noun) blue-black berries similar to American blueberries | Synonyms: European blueberry, whortleberry |
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| (noun) erect blueberry of western United States having solitary flowers and somewhat sour berries | Synonyms: mountain blue berry, thin-leaved bilberry, Viccinium membranaceum |
| (noun) erect European blueberry having solitary flowers and blue-black berries | Synonyms: blaeberry, Viccinium myrtillus, whinberry, whortleberry |
| bilby | (noun) bandicoot with leathery ears like a rabbit | Synonyms: Macrotis lagotis, rabbit-eared bandicoot, rabbit bandicoot |
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| billboard | (noun) large outdoor signboard | Synonyms: hoarding |
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| bulb | (noun) electric lamp consisting of a transparent or translucent glass housing containing a wire filament (usually tungsten) that emits light when heated by electricity | Synonyms: electric-light bulb, electric light, incandescent lamp, light bulb, lightbulb |
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| (noun) a rounded part of a cylindrical instrument (usually at one end) | - |
| (noun) a rounded dilation or expansion in a canal or vessel or organ | - |
| (noun) lower or hindmost part of the brain; continuous with spinal cord; (`bulb' is an old term for medulla oblongata) | Synonyms: medulla, medulla oblongata |
| (noun) a modified bud consisting of a thickened globular underground stem serving as a reproductive structure | - |
| (noun) anything with a round shape resembling a teardrop | - |
| 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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| bulblet | (noun) small bulb or bulb-shaped growth arising from the leaf axil or in the place of flowers | Synonyms: bulbil |
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| bulbul | (noun) nightingale spoken of in Persian poetry | - |
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| bullbat | (noun) mainly nocturnal North American goatsucker | Synonyms: mosquito hawk, nighthawk |
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| bullbrier | (noun) a very prickly woody vine of the eastern United States growing in tangled masses having tough round stems with shiny leathery leaves and small greenish flowers followed by clusters of inedible shiny black berries | Synonyms: briar, brier, catbrier, greenbrier, horse-brier, horse brier, Smilax rotundifolia |
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| callback | (noun) a request by the manufacturer of a defective product to return the product (as for replacement or repair) | Synonyms: recall |
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| cellblock | (noun) a division of a prison (usually consisting of several cells) | Synonyms: ward |
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| chilblain | (noun) inflammation of the hands and feet caused by exposure to cold and moisture | Synonyms: chilblains, pernio |
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| chilblains | (noun) inflammation of the hands and feet caused by exposure to cold and moisture | Synonyms: chilblain, pernio |
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| coalbin | (noun) a bin for holding coal | Synonyms: coalhole |
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| coralbells | (noun) perennial plant of the western United States having bright red flowers in feathery spikes; used as an ornamental | Synonyms: Heuchera sanguinea |
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| coralberry | (noun) shrub with coral-red berries; Japan to northern India | Synonyms: Ardisia crenata, spiceberry |
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| (noun) North American deciduous shrub cultivated for it abundant clusters of coral-red berrylike fruits | Synonyms: Indian currant, Symphoricarpos orbiculatus |
| diethylstilbesterol | (noun) synthetic nonsteroid with the properties of estrogen; formerly used to treat menstrual problems but was found to be associated with vaginal cancers in the daughters of women so treated during pregnancy | Synonyms: DES, stilbesterol |
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| diethylstilbestrol | (noun) a potent estrogen used in medicine and in feed for livestock and poultry | Synonyms: DES, diethylstilboestrol, stilbestrol, stilboestrol |
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| diethylstilboestrol | (noun) a potent estrogen used in medicine and in feed for livestock and poultry | Synonyms: DES, diethylstilbestrol, stilbestrol, stilboestrol |
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| eelblenny | (noun) eellike fishes found in subarctic coastal waters | - |
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| elbow | (noun) the joint of a mammal or bird that corresponds to the human elbow | - |
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| (noun) the part of a sleeve that covers the elbow joint | - |
| (noun) a sharp bend in a road or river | - |
| (noun) a length of pipe with a sharp bend in it | - |
| (noun) hinge joint between the forearm and upper arm and the corresponding joint in the forelimb of a quadruped | Synonyms: articulatio cubiti, cubital joint, cubitus, elbow joint, human elbow |
| elbowing | (noun) jostling with the elbows | - |
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| fallback | (noun) to break off a military action with an enemy | Synonyms: disengagement, pullout |
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| fallboard | (noun) the hinged protective covering that protects the keyboard of a piano when it is not being played | Synonyms: fall-board |
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| filbert | (noun) nut of any of several trees of the genus Corylus | Synonyms: cob, cobnut, hazelnut |
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| (noun) small nut-bearing tree much grown in Europe | Synonyms: cobnut, Corylus avellana, Corylus avellana grandis |
| flannelbush | (noun) any of several handsome evergreen shrubs of California and northern Mexico having downy lobed leaves and showy yellow flowers | Synonyms: California beauty, flannel bush |
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| flashbulb | (noun) a lamp for providing momentary light to take a photograph | Synonyms: flash, flash bulb, flash lamp, flashgun, photoflash |
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| fullback | (noun) (American football) the position of a back on a football team, generally larger in size than halfbacks | - |
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| (noun) (football) the running back who plays the fullback position on the offensive team | - |
| galbanum | (noun) a bitter aromatic gum resin that resembles asafetida | Synonyms: gum albanum |
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| galbulus | (noun) the seed-producing cone of a cypress tree | - |
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| gallberry | (noun) evergreen holly of eastern North America with oblong leathery leaves and small black berries | Synonyms: evergreen winterberry, gall-berry, Ilex glabra, inkberry |
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| gallbladder | (noun) a muscular sac attached to the liver that stores bile (secreted by the liver) until it is needed for digestion | Synonyms: gall bladder |
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| gaolbird | (noun) a criminal who has been jailed repeatedly | Synonyms: jail bird, jailbird |
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| gaolbreak | (noun) an escape from jail | Synonyms: break, breakout, jailbreak, prison-breaking, prisonbreak |
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| gilbert | (noun) a unit of magnetomotive force equal to 0.7958 ampere-turns | Synonyms: Gb, Gi |
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| halberd | (noun) a pike fitted with an ax head | - |
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| halberdier | (noun) a guard who carries a halberd (as a symbol of his duty) | - |
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| heelbone | (noun) the largest tarsal bone; forms the human heel | Synonyms: calcaneus, os tarsi fibulare |
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| hellbender | (noun) large salamander of North American rivers and streams | Synonyms: Cryptobranchus alleganiensis, mud puppy |
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| hillbilly | (noun) a disparaging term for an unsophisticated person | Synonyms: bushwhacker |
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| jailbird | (noun) a criminal who has been jailed repeatedly | Synonyms: gaolbird, jail bird |
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| jailbreak | (noun) an escape from jail | Synonyms: break, breakout, gaolbreak, prison-breaking, prisonbreak |
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| (noun) the removal of security locks from an electronic device | - |
| keelboat | (noun) river boat with a shallow draught and a keel but no sails; used to carry freight; moved by rowing or punting or towing | - |
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| lactalbumin | (noun) albumin occurring in milk | - |
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| lb | (noun) 16 ounces avoirdupois | Synonyms: pound |
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| lightbulb | (noun) electric lamp consisting of a transparent or translucent glass housing containing a wire filament (usually tungsten) that emits light when heated by electricity | Synonyms: bulb, electric-light bulb, electric light, incandescent lamp, light bulb |
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| mailbag | (noun) letter carrier's shoulder bag | Synonyms: postbag |
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| (noun) pouch used in the shipment of mail | Synonyms: mail pouch |
| mailboat | (noun) a boat for carrying mail | Synonyms: mail boat, packet, packet boat |
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| mailbox | (noun) a private box for delivery of mail | Synonyms: letter box |
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| (noun) public box for deposit of mail | Synonyms: letter box, postbox |
| marlberry | (noun) tropical American shrub or small tree with brown wood and dark berries | Synonyms: Ardisia escallonoides, Ardisia paniculata |
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| mealberry | (noun) evergreen mat-forming shrub of North America and northern Eurasia having small white flowers and red berries; leaves turn red in autumn | Synonyms: Arctostaphylos uva-ursi, bear's grape, common bearberry, creashak, hog cranberry, mountain box, red bearberry, sand berry, sandberry, wild cranberry |
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| methylbenzene | (noun) a colorless flammable liquid obtained from petroleum or coal tar; used as a solvent for gums and lacquers and in high-octane fuels | Synonyms: toluene |
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| millboard | (noun) stout pasteboard used to bind books | - |
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| mulberry | (noun) sweet usually dark purple blackberry-like fruit of any of several mulberry trees of the genus Morus | - |
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| (noun) any of several trees of the genus Morus having edible fruit that resembles the blackberry | Synonyms: mulberry tree |
| nailbrush | (noun) a brush used to clean a person's fingernails | - |
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| oilbird | (noun) nocturnal fruit-eating bird of South America that has fatty young yielding an oil that is used instead of butter | Synonyms: guacharo, Steatornis caripensis |
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| ovalbumin | (noun) the white part of an egg; the nutritive and protective gelatinous substance surrounding the yolk consisting mainly of albumin dissolved in water | Synonyms: albumen, egg white, white |
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| pallbearer | (noun) one of the mourners carrying the coffin at a funeral | Synonyms: bearer |
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| phenylbutazone | (noun) anti-inflammatory drug (trade name Butazolidin) | Synonyms: Butazolidin |
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| pillbox | (noun) a small enclosed gun emplacement (usually of fortified concrete) | - |
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| (noun) a small case for holding pills | - |
| (noun) a small round woman's hat | Synonyms: toque, turban |
| pseudobulb | (noun) a solid bulblike enlargement of the stem of some orchids | - |
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| pullback | (noun) (military) the act of pulling back (especially an orderly withdrawal of troops) | - |
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| (noun) a device (as a decorative loop of cord or fabric) for holding or drawing something back | Synonyms: tieback |
| railbird | (noun) a fan of racing who watches races from the outer rail of the track | - |
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| rollback | (noun) the act of forcing the enemy to withdraw | Synonyms: push back |
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| (noun) reducing prices back to some earlier level | - |
| sailboat | (noun) a small sailing vessel; usually with a single mast | Synonyms: sailing boat |
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| schoolbag | (noun) a bag for carrying school books and supplies | - |
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| schoolbook | (noun) a book prepared for use in schools or colleges | Synonyms: school text, text, text edition, textbook |
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| schoolboy | (noun) a boy attending school | - |
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| shellbark | (noun) North American hickory having loose grey shaggy bark and edible nuts | Synonyms: Carya ovata, shagbark, shagbark hickory, shellbark hickory |
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| shovelboard | (noun) a game in which players use long sticks to shove wooden disks onto the scoring area marked on a smooth surface | Synonyms: shuffleboard |
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| spellbinder | (noun) an orator who can hold his listeners spellbound | - |
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| stilbesterol | (noun) synthetic nonsteroid with the properties of estrogen; formerly used to treat menstrual problems but was found to be associated with vaginal cancers in the daughters of women so treated during pregnancy | Synonyms: DES, diethylstilbesterol |
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| stilbestrol | (noun) a potent estrogen used in medicine and in feed for livestock and poultry | Synonyms: DES, diethylstilbestrol, diethylstilboestrol, stilboestrol |
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| stilboestrol | (noun) a potent estrogen used in medicine and in feed for livestock and poultry | Synonyms: DES, diethylstilbestrol, diethylstilboestrol, stilbestrol |
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| stillbirth | (noun) a natural loss of the products of conception | Synonyms: miscarriage, spontaneous abortion |
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