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Glossary · Nouns · B

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TermTypeDefinitionClassificationsUpdated
Bnoun(physics) a unit of nuclear cross sectionverifiedMay 18, 2026
B-Mesonnounexceedingly short-lived mesonverifiedMay 18, 2026
Babanouna small cake leavened with yeastverifiedMay 18, 2026
Baba Au RhumnounMWEa baba soaked in rumverifiedMay 18, 2026
Babacu OilnounMWEfatty oil from kernels of babassu nuts similar to coconut oilverifiedMay 18, 2026
Babassunountall feather palm of northern Brazil with hard-shelled nuts yielding valuable oil and a kind of vegetable ivoryverifiedMay 18, 2026
Babassu NutnounMWEhard-shelled nut of the babassu palmverifiedMay 18, 2026
Babassu OilnounMWEfatty oil from kernels of babassu nuts similar to coconut oilverifiedMay 18, 2026
Babassu PalmnounMWEtall feather palm of northern Brazil with hard-shelled nuts yielding valuable oil and a kind of vegetable ivoryverifiedMay 18, 2026
Babbittnounan alloy of tin with some copper and antimonyverifiedMay 18, 2026
Babbittingnounlining a surface or bearing with Babbitt metalverifiedMay 18, 2026
Babblernounany of various insectivorous Old World birds with a loud incessant songverifiedMay 18, 2026
Babblingnoungibberish resembling the sounds of a babyverifiedMay 18, 2026
Babenouna very young child (birth to 1 year) who has not yet begun to walk or talkverifiedMay 18, 2026
Babelnouna confusion of voices and other soundsverifiedMay 18, 2026
Babies' SlippersnounMWEEuropean forage plant having claw-shaped pods introduced in AmericaverifiedMay 18, 2026
Babies'-Breathnountall plant with small lance-shaped leaves and numerous tiny white or pink flowersverifiedMay 18, 2026
BabiroussanounIndonesian wild pig with enormous curved canine teethverifiedMay 18, 2026
BabirusanounIndonesian wild pig with enormous curved canine teethverifiedMay 18, 2026
BabirussanounIndonesian wild pig with enormous curved canine teethverifiedMay 18, 2026
Babkanouna coffee cake flavored with orange rind and raisins and almondsverifiedMay 18, 2026
Baboonounused as a Hindi courtesy titleverifiedMay 18, 2026
Baboonnounlarge terrestrial monkeys having doglike muzzlesverifiedMay 18, 2026
Babunounused as a Hindi courtesy titleverifiedMay 18, 2026
Babushkanouna woman's headscarf folded into a triangle and tied under the chinverifiedMay 18, 2026
Baby BednounMWEa small bed for babiesverifiedMay 18, 2026
Baby BirdnounMWEyoung bird not yet fledgedverifiedMay 18, 2026
Baby Blue-EyesnounMWEdelicate California annual having blue flowers marked with dark spotsverifiedMay 18, 2026
Baby BoomnounMWEthe larger than expected generation in United States born shortly after World War IIverifiedMay 18, 2026
Baby BoomernounMWEa person born in the US after WWII in the 1950's, a time notable for high population growthverifiedMay 18, 2026
Baby BuggynounMWEa small vehicle with four wheels in which a baby or child is pushed aroundverifiedMay 18, 2026
Baby BusternounMWEa person born in the generation following the baby boom when the birth rate fell dramaticallyverifiedMay 18, 2026
Baby CarriagenounMWEa small vehicle with four wheels in which a baby or child is pushed aroundverifiedMay 18, 2026
Baby FarmernounMWEsomeone who runs an establishment that houses and cares for babies for a feeverifiedMay 18, 2026
Baby GrandnounMWEa small grand pianoverifiedMay 18, 2026
Baby Grand PianonounMWEa small grand pianoverifiedMay 18, 2026
Baby OilnounMWEan ointment for babiesverifiedMay 18, 2026
Baby PowdernounMWEpowder used to prevent a baby's diaper from chafingverifiedMay 18, 2026
Baby RosenounMWEvigorously growing rose having clusters of numerous small flowersverifiedMay 18, 2026
Baby ShoenounMWEa shoe designed to be worn by infantsverifiedMay 18, 2026
Baby TalknounMWEan adult's imitation of the speech of a young childverifiedMay 18, 2026
Baby ToothnounMWEone of the first temporary teeth of a young mammal (one of 20 in children)verifiedMay 18, 2026
Baby-Boom GenerationnounMWEthe larger than expected generation in United States born shortly after World War IIverifiedMay 18, 2026
Baby-Walkernounan enclosing framework on casters or wheelsverifiedMay 18, 2026
Baby's BreathnounMWEtall plant with small lance-shaped leaves and numerous tiny white or pink flowersverifiedMay 18, 2026
Baby's DummynounMWEdevice used for an infant to suck or bite onverifiedMay 18, 2026
Baby's RoomnounMWEa child's room for a babyverifiedMay 18, 2026
Baby's TearsnounMWEprostrate or creeping Corsican herb with moss-like small round short-stemmed leavesverifiedMay 18, 2026
Babyhoodnounthe early stage of growth or developmentverifiedMay 18, 2026
Babymindernouna person who looks after babies (usually in the person's own home) while the babys' parents are workingverifiedMay 18, 2026
Babysitternouna person engaged to care for children when the parents are not homeverifiedMay 18, 2026
Babysittingnounthe work of a baby sitterverifiedMay 18, 2026
Baccanounan indehiscent fruit derived from a single ovary having one or many seeds within a fleshy wall or pericarp: e.g. grapeverifiedMay 18, 2026
Baccalaureatenounan academic degree conferred on someone who has successfully completed undergraduate studiesverifiedMay 18, 2026
Baccaratnouna card game played in casinos in which two or more punters gamble against the bankerverifiedMay 18, 2026
Bacchanalianouna wild gathering involving excessive drinking and promiscuityverifiedMay 18, 2026
Bacchantnoun(classical mythology) a priest or votary of BacchusverifiedMay 18, 2026
Bacchantenoun(classical mythology) a priestess or votary of BacchusverifiedMay 18, 2026
Baccynounleaves of the tobacco plant dried and prepared for smoking or ingestionverifiedMay 18, 2026
Bachelornouna man who has never been marriedverifiedMay 18, 2026
Bachelor GirlnounMWEa young unmarried woman who lives aloneverifiedMay 18, 2026
Bachelor PartynounMWEa traditional party held for a bachelor before they are married, usually attended by close friends and without their fiancee presentverifiedMay 18, 2026
Bachelor-At-Armsnouna knight of the lowest orderverifiedMay 18, 2026
Bachelor's ButtonnounMWEan annual Eurasian plant cultivated in North America having showy heads of blue or purple or pink or white flowersverifiedMay 18, 2026
Bachelor's DegreenounMWEan academic degree conferred on someone who has successfully completed undergraduate studiesverifiedMay 18, 2026
Bachelorettenouna young unmarried woman who lives aloneverifiedMay 18, 2026
Bachelorhoodnounthe time of a man's life prior to marriageverifiedMay 18, 2026
Bacillary DysenterynounMWEan acute infection of the intestine by shigella bacteriaverifiedMay 18, 2026
Bacillary White DiarrheanounMWEa serious bacterial disease of young chickensverifiedMay 18, 2026
Bacillary White DiarrhoeanounMWEa serious bacterial disease of young chickensverifiedMay 18, 2026
Bacillusnounaerobic rod-shaped spore-producing bacteriumverifiedMay 18, 2026
Bacitracinnouna polypeptide antibiotic of known chemical structure effective against several types of Gram-positive organismsverifiedMay 18, 2026
Back BracenounMWEa brace worn to support the backverifiedMay 18, 2026
Back BreakernounMWEstreet name for lysergic acid diethylamideverifiedMay 18, 2026
Back BurnernounMWEreduced priorityverifiedMay 18, 2026
Back ChannelnounMWEan alternative to the regular channels of communication that is used when agreements must be made secretly (especially in diplomacy or government)verifiedMay 18, 2026
Back CirclenounMWEa feat in which an acrobat arches the back from a prone position and bends the knees until the toes touch the headverifiedMay 18, 2026
Back CountrynounMWEa remote and undeveloped areaverifiedMay 18, 2026
Back EndnounMWEthe side of an object that is opposite its frontverifiedMay 18, 2026
Back EntrancenounMWEan entrance at the rear of a buildingverifiedMay 18, 2026
Back ExercisenounMWEexercise designed to strengthen the back musclesverifiedMay 18, 2026
Back JudgenounMWEa football officialverifiedMay 18, 2026
Back MatternounMWEwritten matter following the main text of a bookverifiedMay 18, 2026
Back of BeyondnounMWEa very remote and inaccessible placeverifiedMay 18, 2026
Back Office Conversion (BOC)nounMWEUnder NACHA rules, BOC allows retailers and billers that accept checks at the point-of-sale or at manned bill payment locations to convert eligible checks to ACH debits in the back-office.ProcessRegulatedPCIMay 9, 2026
Back PorchnounMWEa porch for the back doorverifiedMay 18, 2026
Back RoomnounMWEa room located in the rear of an establishmentverifiedMay 18, 2026
Back StreetnounMWEa narrow street with walls on both sidesverifiedMay 18, 2026
Back ToothnounMWEa tooth situated at the back of the mouthverifiedMay 18, 2026
Back-Formationnouna word invented (usually unwittingly by subtracting an affix) on the assumption that a familiar word derives from itverifiedMay 18, 2026
Back-Numbernounsomeone who is no longer popularverifiedMay 18, 2026
Back-TestingnounA form of outcomes analysis that involves the comparison of actual outcomes with modeled forecasts during a development sample time period (in-sample back-testing) and during a sample period not used in model development (out-of-time back-testing), and at an observation frequency that matches the forecast horizon or performance window of the model.ProcessRegulatedMay 18, 2026
Back-up GenerationsnounMWEA tape rotation methodology that creates three sets of back-up tapes: daily incremental sets or "sons," weekly full sets or "fathers," and end-of-month tapes or "grandfathers." This back-up methodology is frequently used to refer to master files for financial applications.ProcessRegulatedMay 12, 2026
Backachenounan ache localized in the backverifiedMay 18, 2026
Backbandnouna broad band that passes over the back of a horse and supports the shafts of a vehicleverifiedMay 18, 2026
Backbeatnouna loud steady beatverifiedMay 18, 2026
Backbenchnounany of the seats occupied by backbenchers in the House of CommonsverifiedMay 18, 2026
Backbenchernouna member of the House of Commons who is not a party leaderverifiedMay 18, 2026
Backbendnounan acrobatic feat in which the trunk is bent backward from a standing position until the hands touch the floorverifiedMay 18, 2026
Backbiternounone who attacks the reputation of another by slander or libelverifiedMay 18, 2026