| baptistery | (noun) bowl for baptismal water | Synonyms: baptismal font, baptistry, font |
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| baptistry | (noun) bowl for baptismal water | Synonyms: baptismal font, baptistery, font |
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| barbershop | (noun) a shop where men can get their hair cut | - |
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| barkeep | (noun) an employee who mixes and serves alcoholic drinks at a bar | Synonyms: barkeeper, bartender, mixologist |
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| barkeeper | (noun) an employee who mixes and serves alcoholic drinks at a bar | Synonyms: barkeep, bartender, mixologist |
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| barograph | (noun) a recording barometer; automatically records on paper the variations in atmospheric pressure | - |
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| baroreceptor | (noun) a sensory receptor that responds to pressure | - |
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| basidiocarp | (noun) the fruiting body of a basidiomycete which bears its spores on special cells | - |
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| basidiospore | (noun) a sexually produced fungal spore borne on a basidium | - |
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| basophil | (noun) a leukocyte with basophilic granules easily stained by basic stains | Synonyms: basophile |
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| basophile | (noun) a leukocyte with basophilic granules easily stained by basic stains | Synonyms: basophil |
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| basophilia | (noun) the tendency of cells to stain with basic dyes | - |
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| bathyscape | (noun) navigable deep diving vessel for underwater exploration | Synonyms: bathyscaph, bathyscaphe |
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| bathyscaph | (noun) navigable deep diving vessel for underwater exploration | Synonyms: bathyscape, bathyscaphe |
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| bathyscaphe | (noun) navigable deep diving vessel for underwater exploration | Synonyms: bathyscape, bathyscaph |
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| bathysphere | (noun) spherical deep diving apparatus (lowered by a cable) for underwater exploration | - |
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| battleship | (noun) large and heavily armoured warship | Synonyms: battlewagon |
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| bebop | (noun) an early form of modern jazz (originating around 1940) | Synonyms: bop |
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| bedpan | (noun) a shallow vessel used by a bedridden patient for defecation and urination | - |
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| bedpost | (noun) any of 4 vertical supports at the corners of a bedstead | - |
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| bedspread | (noun) decorative cover for a bed | Synonyms: bed cover, bed covering, bedcover, counterpane, spread |
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| bedspring | (noun) (usually in the plural) one of the springs holding up the mattress of a bed | - |
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| beekeeper | (noun) a farmer who keeps bees for their honey | Synonyms: apiarist, apiculturist |
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| beekeeping | (noun) the cultivation of bees on a commercial scale for the production of honey | Synonyms: apiculture |
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| beep | (noun) a short high tone produced as a signal or warning | Synonyms: bleep |
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| beeper | (noun) an electronic device that generates a series of beeps when the person carrying it is being paged | Synonyms: pager |
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| bellhop | (noun) someone employed as an errand boy and luggage carrier around hotels | Synonyms: bellboy, bellman |
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| bellpull | (noun) a handle or cord that is pulled to ring a doorbell or a servant's bell etc. | - |
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| benzodiazepine | (noun) any of several similar lipophilic amines used as tranquilizers or sedatives or hypnotics or muscle relaxants; chronic use can lead to dependency | - |
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| benzylpenicillin | (noun) the penicillin that constitutes the principal component of many commercial antibiotics | Synonyms: penicillin G |
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| bibliographer | (noun) someone trained in compiling bibliographies | - |
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| bibliography | (noun) a list of writings with time and place of publication (such as the writings of a single author or the works referred to in preparing a document etc.) | - |
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| bibliophile | (noun) someone who loves (and usually collects) books | Synonyms: book lover, booklover |
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| bibliopole | (noun) a dealer in secondhand books (especially rare or curious books) | Synonyms: bibliopolist |
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| bibliopolist | (noun) a dealer in secondhand books (especially rare or curious books) | Synonyms: bibliopole |
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| biceps | (noun) any skeletal muscle having two origins (but especially the muscle that flexes the forearm) | - |
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| bicuspid | (noun) a tooth having two cusps or points; located between the incisors and the molars | Synonyms: premolar |
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| biochip | (noun) a microchip that uses tiny strands of DNA to latch onto and quickly recognize thousands of genes at a time; intended for use in a biological environment | - |
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| biogeography | (noun) dealing with the geographical distribution of animals and plants | - |
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| biographer | (noun) someone who writes an account of a person's life | - |
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| biographism | (noun) reduction of textual meaning to authorial biography. | - |
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| biography | (noun) an account of the series of events making up a person's life | Synonyms: life, life history, life story |
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| biophysicist | (noun) a physicist who applies the methods of physics to biology | - |
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| biophysics | (noun) physics as applied to biological problems | - |
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| biopiracy | (noun) biological theft; illegal collection of indigenous plants by corporations who patent them for their own use | - |
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| biopsy | (noun) examination of tissues or liquids from the living body to determine the existence or cause of a disease | - |
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| bioscope | (noun) a kind of early movie projector | - |
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| (noun) a South African movie theater | - |
| biosphere | (noun) the regions of the surface and atmosphere of the Earth (or other planet) where living organisms exist | - |
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| biotype | (noun) organisms sharing a specified genotype or the genotype (or peculiarities) so shared | - |
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| bioweapon | (noun) any weapon usable in biological warfare | Synonyms: bioarm, biological weapon |
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| biped | (noun) an animal with two feet | - |
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| bipedalism | (noun) the bodily attribute of being bipedal; having two feet | - |
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| biplane | (noun) old fashioned airplane; has two wings one above the other | - |
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| biprism | (noun) an optical device for obtaining interference fringes | - |
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| birthplace | (noun) the place where someone was born | Synonyms: place of birth |
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| (noun) where something originated or was nurtured in its early existence | Synonyms: cradle, place of origin, provenance, provenience |
| bishop | (noun) (chess) a piece that can be moved diagonally over unoccupied squares of the same color | - |
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| (noun) port wine mulled with oranges and cloves | - |
| (noun) a senior member of the Christian clergy having spiritual and administrative authority; appointed in Christian churches to oversee priests or ministers; considered in some churches to be successors of the twelve Apostles of Christ | - |
| bishopric | (noun) the territorial jurisdiction of a bishop | Synonyms: diocese, episcopate |
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| bishopry | (noun) the office and dignity of a bishop | Synonyms: episcopate |
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| bispak | (noun) A sexually promiscuous Indonesian woman | - |
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| biteplate | (noun) a removable dental appliance that is worn in the palate for diagnostic or therapeutic purposes | Synonyms: bite plate |
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| bitmap | (noun) an image represented as a two dimensional array of brightness values for pixels | Synonyms: electronic image |
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| blackcap | (noun) small brownish-grey warbler with a black crown | Synonyms: Silvia atricapilla |
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| (noun) chickadee having a dark crown | Synonyms: black-capped chickadee, Parus atricapillus |
| (noun) small black-headed European gull | Synonyms: Larus ridibundus, laughing gull, pewit, pewit gull |
| (noun) raspberry native to eastern North America having black thimble-shaped fruit | Synonyms: black raspberry, blackcap raspberry, Rubus occidentalis, thimbleberry |
| blackdamp | (noun) the atmosphere in a mine following an explosion; high in carbon dioxide and incapable of supporting life | Synonyms: chokedamp |
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| blackpoll | (noun) North American warbler having a black-and-white head | Synonyms: Dendroica striate |
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| blacktop | (noun) a black bituminous material used for paving roads or other areas; usually spread over crushed rock | Synonyms: blacktopping |
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| blacktopping | (noun) a black bituminous material used for paving roads or other areas; usually spread over crushed rock | Synonyms: blacktop |
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| bladderpod | (noun) any of several hairy North American herbs having yellow racemose flowers and inflated pods | - |
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| (noun) any of several plants of the genus Physaria having racemose yellow flowers and inflated pods | - |
| (noun) annual or perennial herbs with inflated seed pods; some placed in genus Lesquerella | - |
| (noun) North American wild lobelia having small blue flowers and inflated capsules formerly used as an antispasmodic | Synonyms: Indian tobacco, Lobelia inflata |
| blasphemer | (noun) a person who speaks disrespectfully of sacred things | - |
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| blasphemy | (noun) blasphemous behavior; the act of depriving something of its sacred character | Synonyms: desecration, profanation, sacrilege |
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| (noun) blasphemous language (expressing disrespect for God or for something sacred) | - |
| blastopore | (noun) the opening into the archenteron | - |
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| blastosphere | (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: blastula |
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| blaxploitation | (noun) the exploitation of black people (especially with regard to stereotyped roles in movies) | - |
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| bleep | (noun) a short high tone produced as a signal or warning | Synonyms: beep |
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| blepharism | (noun) condition in which a person blinks continuously | - |
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| blepharitis | (noun) inflammation of the eyelids characterized by redness and swelling and dried crusts | - |
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| blepharospasm | (noun) spasm of the eyelid muscle resulting in closure of the eye | - |
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| blimp | (noun) a small nonrigid airship used for observation or as a barrage balloon | Synonyms: sausage, sausage balloon |
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| blip | (noun) a radar echo displayed so as to show the position of a reflecting surface | Synonyms: pip, radar target |
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| (noun) a sudden minor shock or meaningless interruption | - |
| blooper | (noun) an embarrassing mistake | Synonyms: bloomer, blunder, boner, boo-boo, botch, bungle, flub, foul-up, fuckup, pratfall |
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| blowlamp | (noun) a burner that mixes air and gas to produce a very hot flame | Synonyms: blowtorch, torch |
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| blowpipe | (noun) a tube that directs air or gas into a flame to concentrate heat | Synonyms: blow tube, blowtube |
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| (noun) a tube through which darts can be shot by blowing | Synonyms: blow tube, blowgun, blowtube |
| blowup | (noun) a photographic print that has been enlarged | Synonyms: enlargement, magnification |
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| (noun) an unrestrained expression of emotion | Synonyms: ebullition, effusion, gush, outburst |
| (noun) a violent release of energy caused by a chemical or nuclear reaction | Synonyms: detonation, explosion |
| bluepoint | (noun) small edible oyster typically from the southern shore of Long Island | Synonyms: blue point |
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| (noun) oysters originally from Long Island Sound but now from anywhere along the northeastern seacoast; usually eaten raw | Synonyms: blue point |
| blueprint | (noun) photographic print of plans or technical drawings etc. | - |
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| (noun) something intended as a guide for making something else | Synonyms: design, pattern |
| boatmanship | (noun) skill in handling boats | - |
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| boilerplate | (noun) thick plate iron used in the production of boilers | - |
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| (noun) standard formulations uniformly found in certain types of legal documents or news stories | - |
| bolograph | (noun) record or recording made by a bolometer | Synonyms: bologram |
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| bombproof | (noun) a chamber (often underground) reinforced against bombing and provided with food and living facilities; used during air raids | Synonyms: air-raid shelter, bomb shelter |
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| bondsperson | (noun) someone who signs a bond as surety for someone else | - |
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| bookkeeper | (noun) someone who records the transactions of a business | - |
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| bookkeeping | (noun) the activity of recording business transactions | Synonyms: clerking |
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| bookplate | (noun) a label identifying the owner of a book in which it is pasted | Synonyms: ex libris |
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| bookshop | (noun) a shop where books are sold | Synonyms: bookstall, bookstore |
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| bootstrap | (noun) a strap that is looped and sewn to the top of a boot for pulling it on | - |
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| bop | (noun) an early form of modern jazz (originating around 1940) | Synonyms: bebop |
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| bopeep | (noun) a game played with young children; you hide your face and suddenly reveal it as you say boo! | Synonyms: peekaboo |
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| bottlecap | (noun) a cap that seals a bottle | - |
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| boustrophedon | (noun) an ancient writing system: having alternate lines written in opposite directions; literally `as the ox ploughs' | - |
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| bowsprit | (noun) a spar projecting from the bow of a vessel | - |
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| bpi | (noun) a measure of how densely information is packed on a storage medium | Synonyms: bits per inch |
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