| barbellate | (adjective) having or covered with protective barbs or quills or spines or thorns or setae etc. | Synonyms: barbed, briary, briery, bristled, bristly, burred, burry, prickly, setaceous, setose, spiny, thorny |
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| barbette | (noun) (formerly) a mound of earth inside a fort from which heavy gun can be fired over the parapet | - |
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| barbiturate | (noun) organic compound having powerful soporific effect; overdose can be fatal | - |
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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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| barrette | (noun) a pin for holding women's hair in place | - |
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| basidiomycete | (noun) any of various fungi of the subdivision Basidiomycota | Synonyms: basidiomycetous fungi |
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| baste | (noun) a loose temporary sewing stitch to hold layers of fabric together | Synonyms: basting, basting stitch, tacking |
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| (verb) cover with liquid before cooking | - |
| (verb) sew together loosely, with large stitches | Synonyms: tack |
| (verb) strike violently and repeatedly | Synonyms: batter, clobber |
| bastnaesite | (noun) a yellow-to-brown mineral that is a source of rare earth elements | Synonyms: bastnasite |
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| bastnasite | (noun) a yellow-to-brown mineral that is a source of rare earth elements | Synonyms: bastnaesite |
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| bate | (verb) soak in a special solution to soften and remove chemicals used in previous treatments | - |
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| (verb) flap the wings wildly or frantically; used of falcons | - |
| (verb) moderate or restrain; lessen the force of | - |
| batholite | (noun) large mass of intrusive igneous rock believed to have solidified deep within the earth | Synonyms: batholith, pluton, plutonic rock |
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| batiste | (noun) a thin plain-weave cotton or linen fabric; used for shirts or dresses | - |
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| bauxite | (noun) a clay-like mineral; the chief ore of aluminum; composed of aluminum oxides and aluminum hydroxides; used as an abrasive and catalyst | - |
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| bedlamite | (noun) an archaic term for a lunatic | - |
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| bedmate | (noun) a person with whom you share a bed | Synonyms: bedfellow |
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| belemnite | (noun) a conical calcareous fossil tapering to a point at one end and with a conical cavity at the other end containing (when unbroken) a small chambered phragmocone from the shell of any of numerous extinct cephalopods of the family Belemnitidae | - |
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| beneficiate | (verb) process (ores or other raw materials), as by reduction | - |
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| benficiate | (verb) subject to a reduction process | - |
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| bentonite | (noun) an absorbent aluminum silicate clay formed from volcanic ash | - |
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| benzoate | (noun) any salt or ester of benzoic acid | - |
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| berate | (verb) censure severely or angrily | Synonyms: bawl out, call down, call on the carpet, chew out, chew up, chide, dress down, have words, jaw, lambast, lambaste, lecture, rag, rebuke, remonstrate, reprimand, scold, take to task, trounce |
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| biaxate | (adjective) having two axes | Synonyms: biaxal, biaxial |
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| bicarbonate | (noun) a salt of carbonic acid (containing the anion HCO3) in which one hydrogen atom has been replaced; an acid carbonate | Synonyms: hydrogen carbonate |
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| bichromate | (noun) a salt of the hypothetical dichromic acid | Synonyms: dichromate |
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| bicornate | (adjective) having two horns or horn-shaped parts | Synonyms: bicorn, bicorned, bicornuate, bicornuous |
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| bicornuate | (adjective) having two horns or horn-shaped parts | Synonyms: bicorn, bicornate, bicorned, bicornuous |
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| bicuspidate | (adjective) having two cusps or points (especially a molar tooth) | Synonyms: bicuspid |
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| bidentate | (adjective) having toothlike projections that are themselves toothed | - |
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| biflagellate | (adjective) having two flagella | - |
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| bifoliate | (adjective) having two leaves | - |
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| bifurcate | (adjective) resembling a fork; divided or separated into two branches | Synonyms: biramous, branched, forficate, fork-like, forked, pronged, prongy |
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| (verb) divide into two branches | - |
| (verb) split or divide into two | - |
| bilabiate | (adjective) having two lips | Synonyms: two-lipped |
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| billingsgate | (noun) foul-mouthed or obscene abuse | Synonyms: scurrility |
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| bilobate | (adjective) divided into two lobes | Synonyms: bilobated, bilobed |
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| biloculate | (adjective) divided into or containing two cells or chambers | Synonyms: bilocular |
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| binate | (adjective) growing in two parts or in pairs | - |
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| binucleate | (adjective) having two nuclei | Synonyms: binuclear, binucleated |
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| biotite | (noun) dark brown to black mica found in igneous and metamorphic rock | - |
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| bipartite | (adjective) divided into two portions almost to the base | - |
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| (adjective) involving two parts or elements | Synonyms: two-part, two-way |
| bipinnate | (adjective) of a leaf shape; having doubly pinnate leaflets (as ferns) | - |
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| biquadrate | (noun) an algebraic equation or function of the fourth degree | Synonyms: biquadratic, fourth power, quartic |
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| birthrate | (noun) the ratio of live births in an area to the population of that area; expressed per 1000 population per year | Synonyms: birth rate, fertility, fertility rate, natality |
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| biserrate | (adjective) having saw-like notches with the notches themselves similarly notched | - |
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| bisulcate | (adjective) (used of hooves) split, divided | Synonyms: cloven |
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| bisulfate | (noun) a salt or an ester of sulphuric acid with the chemical formula HSO4-. | Synonyms: hydrogen sulfate |
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| bitartrate | (noun) an acid tartrate; a hydrogen tartrate | - |
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| bite | (noun) the act of gripping or chewing off with the teeth and jaws | Synonyms: chomp |
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| (noun) a portion removed from the whole | - |
| (noun) a strong odor or taste property | Synonyms: pungency, raciness, sharpness |
| (noun) wit having a sharp and caustic quality | Synonyms: pungency |
| (noun) (angling) an instance of a fish taking the bait | - |
| (noun) a light informal meal | Synonyms: collation, snack |
| (noun) a small amount of solid food; a mouthful | Synonyms: bit, morsel |
| (noun) a wound resulting from biting by an animal or a person | - |
| (noun) a painful wound caused by the thrust of an insect's stinger into skin | Synonyms: insect bite, sting |
| (verb) to grip, cut off, or tear with or as if with the teeth or jaws | Synonyms: seize with teeth |
| (verb) penetrate or cut, as with a knife | - |
| (verb) deliver a sting to | Synonyms: prick, sting |
| (verb) cause a sharp or stinging pain or discomfort | Synonyms: burn, sting |
| biteplate | (noun) a removable dental appliance that is worn in the palate for diagnostic or therapeutic purposes | Synonyms: bite plate |
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| bivariate | (adjective) having two variables | - |
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| blastocyte | (noun) an undifferentiated embryonic cell | - |
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| blastomycete | (noun) any of various yeastlike budding fungi of the genus Blastomyces; cause disease in humans and other animals | - |
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| blate | (adjective) disposed to avoid notice | Synonyms: bashful |
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| (verb) cry plaintively | Synonyms: baa, blat, bleat |
| blatherskite | (noun) foolish gibberish | Synonyms: blather |
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| bloviate | (verb) orate verbosely and windily | - |
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| bobwhite | (noun) a popular North American game bird; named for its call | Synonyms: bobwhite quail, partridge |
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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 | - |
| bolete | (noun) any fungus of the family Boletaceae | - |
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| bombilate | (verb) make a buzzing sound | Synonyms: bombinate, buzz |
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| bombinate | (verb) make a buzzing sound | Synonyms: bombilate, buzz |
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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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| borate | (noun) a salt or ester of boric acid | - |
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| bornite | (noun) a mineral consisting of sulfides of copper and iron that is found in copper deposits | Synonyms: peacock ore |
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| borosilicate | (noun) a salt of boric and silicic acids | - |
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| brachiate | (adjective) having arms or armlike appendages | - |
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| (adjective) having widely spreading paired branches | - |
| (verb) swing from one hold to the next | - |
| bracteate | (adjective) having bracts | Synonyms: bracted |
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| bracteolate | (adjective) having bracteoles | - |
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| branchiate | (adjective) provided with gills | Synonyms: gilled |
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| breastplate | (noun) armor plate that protects the chest; the front part of a cuirass | Synonyms: aegis, egis |
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| brecciate | (verb) break into breccia | - |
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| (verb) form into breccia | - |
| briquette | (noun) a block made from charcoal or coal dust and burned as fuel | Synonyms: briquet |
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| brochette | (noun) a small spit or skewer | - |
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| bromate | (noun) a chemical compound that contains the bromate ion. | - |
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| (verb) treat with bromine | Synonyms: brominate |
| (verb) react with bromine | Synonyms: brominate |
| brominate | (verb) treat with bromine | Synonyms: bromate |
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| (verb) react with bromine | Synonyms: bromate |
| brunette | (adjective) marked by dark or relatively dark pigmentation of hair or skin or eyes | Synonyms: brunet |
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| (noun) a person with dark (brown) hair | Synonyms: brunet |
| brute | (adjective) resembling a beast; showing lack of human sensibility | Synonyms: beastly, bestial, brutal, brutish |
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| (noun) a living organism characterized by voluntary movement | Synonyms: animal, animate being, beast, creature, fauna |
| (noun) a cruelly rapacious person | Synonyms: beast, savage, wildcat, wolf |
| bryophyte | (noun) any of numerous plants of the division Bryophyta | Synonyms: nonvascular plant |
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| bullate | (adjective) of leaves; appearing puckered as if blistered | - |
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| bunkmate | (noun) someone who occupies the same sleeping quarters as yourself | - |
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| burette | (noun) measuring instrument consisting of a graduated glass tube with a tap at the bottom; used for titration | Synonyms: buret |
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| butte | (noun) a hill that rises abruptly from the surrounding region; has a flat top and sloping sides | - |
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| butylate | (verb) introduce the butyl group into a chemical compound | - |
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| byte | (noun) a sequence of 8 bits (enough to represent one character of alphanumeric data) processed as a single unit of information | - |
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| cachinnate | (verb) laugh loudly and in an unrestrained way | - |
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| calceolate | (adjective) of slipper-shaped blossoms | Synonyms: calceiform |
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| calcite | (noun) a common mineral consisting of crystallized calcium carbonate; a major constituent of limestone | - |
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| calculate | (verb) make a mathematical calculation or computation | Synonyms: cipher, compute, cypher, figure, reckon, work out |
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| (verb) specifically design a product, event, or activity for a certain public | Synonyms: aim, direct |
| (verb) judge to be probable | Synonyms: count on, estimate, figure, forecast, reckon |
| (verb) have faith or confidence in | Synonyms: bank, bet, count, depend, look, reckon, rely, swear |
| (verb) predict in advance | Synonyms: forecast |
| (verb) keep an account of | Synonyms: account |
| calibrate | (verb) make fine adjustments or divide into marked intervals for optimal measuring | Synonyms: fine-tune, graduate |
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| (verb) measure the caliber of | - |
| (verb) mark (the scale of a measuring instrument) so that it can be read in the desired units | - |
| caliphate | (noun) the office of a caliph | - |
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| (noun) the territorial jurisdiction of a caliph | - |
| calumniate | (verb) charge falsely or with malicious intent; attack the good name and reputation of someone | Synonyms: asperse, besmirch, defame, denigrate, slander, smear, smirch, sully |
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| calyculate | (adjective) having a calyculus | Synonyms: calycled |
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| calyptrate | (adjective) having a calyptra | - |
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| (adjective) having calypters | - |
| campanulate | (adjective) shaped like a bell or campana | Synonyms: campanular, campanulated |
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| camphorate | (verb) treat with camphor | - |
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| campmate | (noun) someone who lives in the same camp you do | - |
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| campsite | (noun) a site where people on holiday can pitch a tent | Synonyms: bivouac, campground, camping area, camping ground, camping site, encampment |
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| canaliculate | (adjective) having thin parallel channels | - |
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| cancellate | (adjective) having an open or latticed or porous structure | Synonyms: cancellated, cancellous |
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| (adjective) having a latticelike structure pierced with holes or windows | Synonyms: cancellated, clathrate |
| candidate | (noun) someone who is considered for something (for an office or prize or honor etc.) | Synonyms: prospect |
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| (noun) a politician who is running for public office | Synonyms: campaigner, nominee |
| cannulate | (verb) introduce a cannula or tube into | Synonyms: cannulise, cannulize, canulate, intubate |
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| cantillate | (verb) recite with musical intonation; recite as a chant or a psalm | Synonyms: chant, intonate, intone |
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