| bacteriologist | (noun) a biologist who studies bacteria | - |
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| bacteriology | (noun) the branch of medical science that studies bacteria in relation to disease | - |
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| bacteriolysis | (noun) dissolution or destruction of bacteria | - |
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| bacteriolytic | (adjective) of or relating to or causing bacteriolysis | - |
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| bacteriophage | (noun) a virus that is parasitic (reproduces itself) in bacteria | Synonyms: phage |
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| bacteriophagic | (adjective) of or relating to bacteriophages | Synonyms: bacteriophagous |
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| bacteriophagous | (adjective) of or relating to bacteriophages | Synonyms: bacteriophagic |
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| bacteriostasis | (noun) inhibition of the growth of bacteria | - |
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| bacteriostat | (noun) a chemical or biological material that inhibits bacterial growth | - |
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| bacteriostatic | (adjective) of or relating to or causing bacteriostasis | - |
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| bacterise | (verb) subject to the action of bacteria | Synonyms: bacterize |
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| bacterium | (noun) (microbiology) single-celled or noncellular spherical or spiral or rod-shaped organisms lacking chlorophyll that reproduce by fission; important as pathogens and for biochemical properties; taxonomy is difficult; often considered to be plants | Synonyms: bacteria |
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| bacterize | (verb) subject to the action of bacteria | Synonyms: bacterise |
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| badgering | (noun) the act of harassing someone | Synonyms: bedevilment, torment, worrying |
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| balbriggan | (noun) a cotton knit fabric used for underwear | - |
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| baldric | (noun) a wide (ornamented) belt worn over the right shoulder to support a sword or bugle by the left hip | Synonyms: baldrick |
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| baldrick | (noun) a wide (ornamented) belt worn over the right shoulder to support a sword or bugle by the left hip | Synonyms: baldric |
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| ballerina | (noun) a female ballet dancer | Synonyms: danseuse |
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| banderilla | (noun) a decorated dart that is implanted in the neck or shoulders of the bull during a bull fight | - |
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| banderillero | (noun) the bullfighter who implants decorated darts (banderillas) into the neck or shoulders of the bull during a bull fight | - |
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| bantering | (adjective) cleverly amusing in tone | Synonyms: facetious, tongue-in-cheek |
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| banteringly | (adverb) in a bantering fashion | Synonyms: tongue-in-cheek |
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| barbarian | (adjective) without civilizing influences | Synonyms: barbaric, savage, uncivilised, uncivilized, wild |
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| (noun) a member of an uncivilized people | Synonyms: savage |
| (noun) a crude uncouth ill-bred person lacking culture or refinement | Synonyms: boor, churl, Goth, peasant, tike, tyke |
| barbaric | (adjective) without civilizing influences | Synonyms: barbarian, savage, uncivilised, uncivilized, wild |
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| (adjective) unrestrained and crudely rich | - |
| barbarisation | (noun) an act that makes people primitive and uncivilized | Synonyms: barbarization |
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| barbarise | (verb) make crude or savage in behavior or speech | Synonyms: barbarize |
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| (verb) become crude or savage or barbaric in behavior or language | Synonyms: barbarize |
| barbarism | (noun) a brutal barbarous savage act | Synonyms: barbarity, brutality, savagery |
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| barbarity | (noun) a brutal barbarous savage act | Synonyms: barbarism, brutality, savagery |
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| (noun) the quality of being shockingly cruel and inhumane | Synonyms: atrociousness, atrocity, barbarousness, heinousness |
| barbarization | (noun) an act that makes people primitive and uncivilized | Synonyms: barbarisation |
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| barbarize | (verb) make crude or savage in behavior or speech | Synonyms: barbarise |
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| (verb) become crude or savage or barbaric in behavior or language | Synonyms: barbarise |
| baric | (adjective) of or relating to or containing barium | - |
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| barilla | (noun) Algerian plant formerly burned to obtain calcium carbonate | Synonyms: Halogeton souda |
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| (noun) bushy plant of Old World salt marshes and sea beaches having prickly leaves; burned to produce a crude soda ash | Synonyms: glasswort, kali, kelpwort, Salsola kali, Salsola soda, saltwort |
| baring | (noun) the removal of covering | Synonyms: denudation, husking, stripping, uncovering |
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| barite | (noun) a white or colorless mineral (BaSO4); the main source of barium | Synonyms: barium sulphate, barytes, heavy spar |
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| baritone | (adjective) lower in range than tenor and higher than bass | - |
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| (noun) the second lowest brass wind instrument | Synonyms: baritone horn |
| (noun) the second lowest adult male singing voice | Synonyms: baritone voice |
| (noun) a male singer | Synonyms: barytone |
| barium | (noun) a soft silvery metallic element of the alkali earth group; found in barite | Synonyms: atomic number 56, Ba |
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| barometric | (adjective) relating to atmospheric pressure or indicated by a barometer | Synonyms: barometrical |
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| barometrical | (adjective) relating to atmospheric pressure or indicated by a barometer | Synonyms: barometric |
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| barricade | (noun) a barrier set up by police to stop traffic on a street or road in order to catch a fugitive or inspect traffic etc. | Synonyms: roadblock |
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| (noun) a barrier (usually thrown up hastily) to impede the advance of an enemy | - |
| (verb) block off with barricades | Synonyms: barricado |
| (verb) prevent access to by barricading | - |
| (verb) render unsuitable for passage | Synonyms: bar, block, block off, block up, blockade, stop |
| barricaded | (adjective) preventing entry or exit or a course of action | Synonyms: barred, blockaded |
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| barricado | (verb) block off with barricades | Synonyms: barricade |
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| barrier | (noun) a structure or object that impedes free movement | - |
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| (noun) any condition that makes it difficult to make progress or to achieve an objective | Synonyms: roadblock |
| (noun) anything serving to maintain separation by obstructing vision or access | - |
| barring | (noun) the act of excluding someone by a negative vote or veto | Synonyms: blackball |
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| barrio | (noun) an urban area in a Spanish-speaking country | - |
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| (noun) a Spanish-speaking quarter in a town or city (especially in the United States) | - |
| barrister | (noun) a British or Canadian lawyer who speaks in the higher courts of law on behalf of either the defense or prosecution | - |
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| bassarisk | (noun) raccoon-like omnivorous mammal of Mexico and the southwestern United States having a long bushy tail with black and white rings | Synonyms: Bassariscus astutus, cacomistle, cacomixle, civet cat, coon cat, miner's cat, raccoon fox, ring-tailed cat, ringtail |
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| bathymetric | (adjective) of or relating to measurements of the depths of oceans or lakes | Synonyms: bathymetrical |
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| bathymetrical | (adjective) of or relating to measurements of the depths of oceans or lakes | Synonyms: bathymetric |
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| battering | (noun) the act of subjecting to strong attack | Synonyms: banging |
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| bearing | (adjective) (of a structural member) withstanding a weight or strain | - |
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| (noun) a rotating support placed between moving parts to allow them to move easily | - |
| (noun) heraldry consisting of a design or image depicted on a shield | Synonyms: armorial bearing, charge, heraldic bearing |
| (noun) dignified manner or conduct | Synonyms: comportment, mien, presence |
| (noun) characteristic way of bearing one's body | Synonyms: carriage, posture |
| (noun) the direction or path along which something moves or along which it lies | Synonyms: aim, heading |
| (noun) relevant relation or interconnection | - |
| bearish | (adjective) expecting prices to fall | - |
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| bedrid | (adjective) confined to bed (by illness) | Synonyms: bedfast, bedridden, sick-abed |
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| bedridden | (adjective) confined to bed (by illness) | Synonyms: bedfast, bedrid, sick-abed |
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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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| befriend | (verb) become friends with | - |
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| begrime | (verb) make soiled, filthy, or dirty | Synonyms: bemire, colly, dirty, grime, soil |
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| begrimed | (adjective) thickly covered with ingrained dirt or soot | Synonyms: dingy, grimy, grubby, grungy, raunchy |
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| behaviorism | (noun) an approach to psychology that emphasizes observable measurable behavior | Synonyms: behavioristic psychology, behaviourism, behaviouristic psychology |
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| behaviorist | (adjective) of or relating to behaviorism | Synonyms: behavioristic, behaviourist, behaviouristic |
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| (noun) a psychologist who subscribes to behaviorism | Synonyms: behaviourist |
| behavioristic | (adjective) of or relating to behaviorism | Synonyms: behaviorist, behaviourist, behaviouristic |
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| behaviourism | (noun) an approach to psychology that emphasizes observable measurable behavior | Synonyms: behaviorism, behavioristic psychology, behaviouristic psychology |
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| behaviourist | (adjective) of or relating to behaviorism | Synonyms: behaviorist, behavioristic, behaviouristic |
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| (noun) a psychologist who subscribes to behaviorism | Synonyms: behaviorist |
| behaviouristic | (adjective) of or relating to behaviorism | Synonyms: behaviorist, behavioristic, behaviourist |
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| beleaguering | (noun) the action of an armed force that surrounds a fortified place and isolates it while continuing to attack | Synonyms: besieging, military blockade, siege |
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| belletristic | (adjective) written and regarded for aesthetic value rather than content | - |
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| beriberi | (noun) avitaminosis caused by lack of thiamine (vitamin B1) | - |
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| berried | (adjective) producing or bearing berries | Synonyms: baccate, bacciferous |
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| besprinkle | (verb) scatter with liquid; wet lightly | Synonyms: sparge, sprinkle |
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| bestride | (verb) get up on the back of | Synonyms: climb on, get on, hop on, jump on, mount, mount up |
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| bettering | (adjective) changing for the better | - |
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| bewilderingly | (adverb) in a bewildering and confusing manner | Synonyms: confusingly |
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| biauricular | (adjective) relating to the two auditory openings | - |
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| bibliothecarial | (adjective) of or relating to a library or bibliotheca or a librarian | Synonyms: bibliothecal |
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| bicentric | (adjective) having two centers | - |
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| bichloride | (noun) a compound containing two chlorine atoms per molecule | Synonyms: dichloride |
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| bickering | (noun) a quarrel about petty points | Synonyms: bicker, fuss, pettifoggery, spat, squabble, tiff |
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| bicylindrical | (adjective) having two cylindrical surfaces usually with parallel axes | - |
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| bigeneric | (adjective) resulting from a cross between species of different genera | - |
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| bimestrial | (adjective) two months long; lasting two months | - |
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| (adjective) occurring every two months | Synonyms: bimonthly |
| bioelectricity | (noun) electric phenomena in animals or plants | - |
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| bioengineering | (noun) the branch of engineering science in which biological science is used to study the relation between workers and their environments | Synonyms: biotechnology, ergonomics |
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| biometrics | (noun) a branch of biology that studies biological phenomena and observations by means of statistical analysis | Synonyms: biometry, biostatistics |
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| bioterrorism | (noun) terrorism using the weapons of biological warfare | Synonyms: biological terrorism |
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| biprism | (noun) an optical device for obtaining interference fringes | - |
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| birefringence | (noun) splitting a ray into two parallel rays polarized perpendicularly | Synonyms: double refraction |
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| birefringent | (adjective) relating to or characterized by double refraction | - |
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| biriani | (noun) an Indian dish made with highly seasoned rice and meat or fish or vegetables | Synonyms: biryani |
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| birthright | (noun) a right or privilege that you are entitled to at birth | - |
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| (noun) an inheritance coming by right of birth (especially by primogeniture) | Synonyms: patrimony |
| bishopric | (noun) the territorial jurisdiction of a bishop | Synonyms: diocese, episcopate |
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| bitterish | (adjective) somewhat bitter | Synonyms: sharp-tasting |
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| bivariate | (adjective) having two variables | - |
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| blaring | (adjective) unpleasantly loud and penetrating | Synonyms: blasting |
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| (noun) a loud harsh or strident noise | Synonyms: blare, cacophony, clamor, din |
| blastomeric | (adjective) of or relating to a blastomere | - |
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| blastoporic | (adjective) of or relating to a blastopore | Synonyms: blastoporal |
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| blastospheric | (adjective) of or relating to a blastula | Synonyms: blastular |
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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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| blistering | (adjective) very fast; capable of quick response and great speed | Synonyms: hot, red-hot |
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| (adjective) hot enough to raise (or as if to raise) blisters | Synonyms: blistery |
| (adjective) harsh or corrosive in tone | Synonyms: acerb, acerbic, acid, acrid, bitter, caustic, sulfurous, sulphurous, virulent, vitriolic |
| (noun) the formation of vesicles in or beneath the skin | Synonyms: vesication, vesiculation |
| blitzkrieg | (noun) a swift and violent military offensive with intensive aerial bombardment | Synonyms: blitz |
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| (verb) fight a quick and surprising war | - |
| 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 |
| (verb) make a blueprint of | Synonyms: draft, draught |