| blastula | (noun) early stage of an embryo produced by cleavage of an ovum; a liquid-filled sphere whose wall is composed of a single layer of cells; during this stage (about eight days after fertilization) implantation in the wall of the uterus occurs | Synonyms: blastosphere |
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| blissfulness | (noun) a state of extreme happiness | Synonyms: bliss, cloud nine, seventh heaven, walking on air |
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| boastfulness | (noun) outspoken conceit | Synonyms: vainglory |
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| bottleful | (noun) the quantity contained in a bottle | Synonyms: bottle |
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| botulin | (noun) potent bacterial toxin produced by the bacterium Clostridium botulinum that causes botulism; can be used as a bioweapon | Synonyms: botulinus toxin, botulismotoxin |
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| botulinum | (noun) anaerobic bacterium producing botulin the toxin that causes botulism | Synonyms: botulinus, Clostridium botulinum |
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| botulinus | (noun) anaerobic bacterium producing botulin the toxin that causes botulism | Synonyms: botulinum, Clostridium botulinum |
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| botulism | (noun) food poisoning from ingesting botulin; not infectious; affects the CNS; can be fatal if not treated promptly | - |
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| botulismotoxin | (noun) potent bacterial toxin produced by the bacterium Clostridium botulinum that causes botulism; can be used as a bioweapon | Synonyms: botulin, botulinus toxin |
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| boulder | (noun) a large smooth mass of rock detached from its place of origin | Synonyms: bowlder |
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| boule | (noun) an inlaid furniture decoration; tortoiseshell and yellow and white metal form scrolls in cabinetwork | Synonyms: boulle, buhl |
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| 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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| boulle | (noun) an inlaid furniture decoration; tortoiseshell and yellow and white metal form scrolls in cabinetwork | Synonyms: boule, buhl |
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| bountifulness | (noun) the property of copious abundance | Synonyms: amplitude, bounty |
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| 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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| brotula | (noun) deep-sea fishes | - |
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| buccula | (noun) a fold of fatty tissue under the chin | Synonyms: double chin |
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| bucketful | (noun) the quantity contained in a bucket | Synonyms: bucket |
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| buckminsterfullerene | (noun) a spheroidal fullerene; the first known example of a fullerene | Synonyms: buckyball |
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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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| bulge | (noun) something that bulges out or is protuberant or projects from its surroundings | Synonyms: bump, excrescence, extrusion, gibbosity, gibbousness, hump, jut, prominence, protrusion, protuberance, swelling |
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| bulghur | (noun) parched crushed wheat | Synonyms: bulgur, bulgur wheat |
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| bulginess | (noun) the property possessed by a rounded convexity | Synonyms: roundedness |
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| bulgur | (noun) parched crushed wheat | Synonyms: bulghur, bulgur wheat |
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| bulimarexia | (noun) a disorder of eating in which the person alternates between strong craving for food and aversion to food; characterized by excessive eating followed by periods of fasting or self-induced vomiting | Synonyms: binge-purge syndrome, binge-vomit syndrome, bulimia nervosa |
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| bulimia | (noun) pathologically insatiable hunger (especially when caused by brain lesions) | - |
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| (noun) a disorder of eating seen among young women who go on eating binges and then feel guilt and depression and self-condemnation | Synonyms: binge-eating syndrome |
| bulimic | (noun) a person suffering from bulimia | - |
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| bulk | (noun) the property of something that is great in magnitude | Synonyms: mass, volume |
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| (noun) the property resulting from being or relating to the greater in number of two parts; the main part | Synonyms: majority |
| (noun) the property possessed by a large mass | - |
| bulkhead | (noun) a partition that divides a ship or plane into compartments | - |
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| bulkiness | (noun) an unwieldy largeness | Synonyms: massiveness |
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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 |
| bulla | (noun) the round leaden seal affixed to a papal bull | - |
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| (noun) (pathology) an elevation of the skin filled with serous fluid | Synonyms: bleb, blister |
| bullace | (noun) small wild or half-domesticated Eurasian plum bearing small ovoid fruit in clusters | Synonyms: Prunus insititia |
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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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| bulldog | (noun) a sturdy thickset short-haired breed with a large head and strong undershot lower jaw; developed originally in England for bull baiting | Synonyms: English bulldog |
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| bulldozer | (noun) large powerful tractor; a large blade in front flattens areas of ground | Synonyms: dozer |
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| bullet | (noun) (baseball) a pitch thrown with maximum velocity | Synonyms: fastball, heater, hummer, smoke |
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| (noun) a projectile that is fired from a gun | Synonyms: slug |
| (noun) a high-speed passenger train | Synonyms: bullet train |
| bullethead | (noun) a head shaped like a bullet | - |
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| bulletin | (noun) a brief report (especially an official statement issued for immediate publication or broadcast) | - |
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| bullfight | (noun) a Spanish or Portuguese or Latin American spectacle; a matador baits and (usually) kills a bull in an arena before many spectators | Synonyms: corrida |
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| bullfighter | (noun) someone who fights bulls | Synonyms: toreador |
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| bullfighting | (noun) the activity at a bullfight | Synonyms: tauromachy |
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| bullfinch | (noun) common European finch mostly black and white with red throat and breast | Synonyms: Pyrrhula pyrrhula |
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| bullfrog | (noun) largest North American frog; highly aquatic with a deep-pitched voice | Synonyms: Rana catesbeiana |
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| bullhead | (noun) freshwater sculpin with a large flattened bony-plated head with hornlike spines | - |
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| (noun) any of several common freshwater catfishes of the United States | Synonyms: bullhead catfish |
| bullheadedness | (noun) resolute adherence to your own ideas or desires | Synonyms: obstinacy, obstinance, pigheadedness, self-will, stubbornness |
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| bullhorn | (noun) a portable loudspeaker with built-in microphone and amplifier | Synonyms: loud-hailer, loud hailer |
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| bullion | (noun) gold or silver in bars or ingots | - |
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| (noun) a mass of precious metal | - |
| bullnose | (noun) a small carpenter's plane with the cutting edge near the front | Synonyms: bullnosed plane |
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| bullock | (noun) castrated bull | Synonyms: steer |
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| (noun) young bull | - |
| bullpen | (noun) a large cell where prisoners (people awaiting trial or sentence or refugees or illegal immigrants) are confined together temporarily | Synonyms: detention cell, detention centre |
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| (noun) a place on a baseball field where relief pitchers can warm up during a game | - |
| bullring | (noun) a stadium where bullfights take place | - |
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| bullrush | (noun) tall rush with soft erect or arching stems found in Eurasia, Australia, New Zealand, and common in North America | Synonyms: bulrush, common rush, Juncus effusus, soft rush |
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| (noun) tall marsh plant with cylindrical seed heads that explode when mature shedding large quantities of down; its long flat leaves are used for making mats and chair seats; of North America, Europe, Asia and North Africa | Synonyms: bulrush, cat's-tail, nailrod, reed mace, reedmace, Typha latifolia |
| bullshit | (noun) Obscene word for unacceptable behavior | Synonyms: bull, crap, dogshit, horseshit, Irish bull, shit |
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| bullshot | (noun) a cocktail made with vodka and beef bouillon or consomme | - |
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| bullterrier | (noun) a powerful short-haired terrier originated in England by crossing the bulldog with terriers | Synonyms: bull terrier |
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| bully | (noun) a cruel and brutal fellow | Synonyms: hooligan, roughneck, rowdy, ruffian, tough, yob, yobbo, yobo |
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| (noun) a hired thug | - |
| bullyboy | (noun) a swaggering tough; usually one acting as an agent of a political faction | - |
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| bullying | (noun) the act of intimidating a weaker person to make them do something | Synonyms: intimidation |
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| bulrush | (noun) tall rush with soft erect or arching stems found in Eurasia, Australia, New Zealand, and common in North America | Synonyms: bullrush, common rush, Juncus effusus, soft rush |
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| (noun) tall marsh plant with cylindrical seed heads that explode when mature shedding large quantities of down; its long flat leaves are used for making mats and chair seats; of North America, Europe, Asia and North Africa | Synonyms: bullrush, cat's-tail, nailrod, reed mace, reedmace, Typha latifolia |
| bulwark | (noun) a protective structure of stone or concrete; extends from shore into the water to prevent a beach from washing away | Synonyms: breakwater, groin, groyne, jetty, mole, seawall |
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| (noun) an embankment built around a space for defensive purposes | Synonyms: rampart, wall |
| (noun) a fencelike structure around a deck | - |
| cagoule | (noun) lightweight parka; waterproof | - |
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| calculability | (noun) The quality of being subject to or ascertainable by calculation. | - |
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| calculation | (noun) the procedure of calculating; determining something by mathematical or logical methods | Synonyms: computation, computing |
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| (noun) problem solving that involves numbers or quantities | Synonyms: computation, figuring, reckoning |
| (noun) planning something carefully and intentionally | Synonyms: deliberation |
| calculator | (noun) a small machine that is used for mathematical calculations; can be mechanical or electronic | Synonyms: calculating machine |
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| (noun) an expert at calculation (or at operating calculating machines) | Synonyms: computer, estimator, figurer, reckoner |
| calculus | (noun) the branch of mathematics that is concerned with limits and with the differentiation and integration of functions | Synonyms: infinitesimal calculus |
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| (noun) a hard lump produced by the concretion of mineral salts; found in hollow organs or ducts of the body | Synonyms: concretion |
| (noun) an incrustation that forms on the teeth and gums | Synonyms: tartar, tophus |
| calendula | (noun) any of numerous chiefly annual herbs of the genus Calendula widely cultivated for their yellow or orange flowers; often used for medicinal and culinary purposes | - |
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| caliculus | (noun) a small cup-shaped structure (as a taste bud or optic cup or cavity of a coral containing a polyp) | Synonyms: calycle, calyculus |
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| calyculus | (noun) a small cup-shaped structure (as a taste bud or optic cup or cavity of a coral containing a polyp) | Synonyms: caliculus, calycle |
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| (noun) a group of bracts simulating a calyx as in a carnation or hibiscus | Synonyms: calycle, epicalyx, false calyx |
| campanula | (noun) any of various plants of the genus Campanula having blue or white bell-shaped flowers | Synonyms: bellflower |
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| canafistula | (noun) deciduous or semi-evergreen tree having scented sepia to yellow flowers in drooping racemes and pods whose pulp is used medicinally; tropical Asia and Central and South America and Australia | Synonyms: canafistola, Cassia fistula, drumstick tree, golden shower tree, pudding pipe tree, purging cassia |
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| canaliculus | (noun) a small canal or duct as in some bones and parts of plants | - |
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| canful | (noun) the quantity contained in a can | Synonyms: can |
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| canicule | (noun) the hot period between early July and early September; a period of inactivity | Synonyms: canicular days, dog days |
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| cannula | (noun) a small flexible tube inserted into a body cavity for draining off fluid or introducing medication | - |
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| cannulation | (noun) the insertion of a cannula or tube into a hollow body organ | Synonyms: cannulisation, cannulization, canulation, canulisation, canulization, intubation |
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| cannulisation | (noun) the insertion of a cannula or tube into a hollow body organ | Synonyms: cannulation, cannulization, canulation, canulisation, canulization, intubation |
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| cannulization | (noun) the insertion of a cannula or tube into a hollow body organ | Synonyms: cannulation, cannulisation, canulation, canulisation, canulization, intubation |
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| canulation | (noun) the insertion of a cannula or tube into a hollow body organ | Synonyms: cannulation, cannulisation, cannulization, canulisation, canulization, intubation |
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| canulisation | (noun) the insertion of a cannula or tube into a hollow body organ | Synonyms: cannulation, cannulisation, cannulization, canulation, canulization, intubation |
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| canulization | (noun) the insertion of a cannula or tube into a hollow body organ | Synonyms: cannulation, cannulisation, cannulization, canulation, canulisation, intubation |
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| capful | (noun) the quantity that a cap will hold | - |
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| capitula | (noun) a short scripture reading; done after a psalmody. | - |
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| capitulation | (noun) the act of surrendering (usually under agreed conditions) | Synonyms: fall, surrender |
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| (noun) a summary that enumerates the main parts of a topic | - |
| (noun) a document containing the terms of surrender | - |
| capitulum | (noun) a dense cluster of flowers or foliage | Synonyms: head |
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| (noun) fruiting spike of a cereal plant especially corn | Synonyms: ear, spike |
| (noun) an arrangement of leafy branches forming the top or head of a tree | - |
| caprimulgid | (noun) mainly crepuscular or nocturnal nonpasserine birds with mottled greyish-brown plumage and large eyes; feed on insects | Synonyms: goatsucker, nightjar |
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| capsule | (noun) a pill in the form of a small rounded gelatinous container with medicine inside | - |
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| (noun) a spacecraft designed to transport people and support human life in outer space | Synonyms: space capsule |
| (noun) a small container | - |
| (noun) a pilot's seat in an airplane that can be forcibly ejected in the case of an emergency; then the pilot descends by parachute | Synonyms: ejection seat, ejector seat |
| (noun) a structure that encloses a body part | - |
| (noun) a shortened version of a written work | Synonyms: abridgement, abridgment, condensation |
| (noun) a dry dehiscent seed vessel or the spore-containing structure of e.g. mosses | - |
| capulin | (noun) Mexican black cherry | Synonyms: Mexican black cherry |
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| (noun) Mexican black cherry tree having edible fruit | Synonyms: capulin tree, Prunus capuli |
| caracul | (noun) hardy coarse-haired sheep of central Asia; lambs are valued for their soft curly black fur | Synonyms: broadtail, karakul |
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| carefulness | (noun) the quality of being careful and painstaking | - |
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| (noun) the trait of being cautious; being attentive to possible danger | Synonyms: caution, cautiousness |
| carful | (noun) the quantity that a car will hold | - |
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| cartonful | (noun) the quantity contained in a carton | Synonyms: carton |
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| caruncula | (noun) an outgrowth on a plant or animal such as a fowl's wattle or a protuberance near the hilum of certain seeds | Synonyms: caruncle |
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| caseful | (noun) the quantity contained in a case | Synonyms: case |
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