| biramous | (adjective) resembling a fork; divided or separated into two branches | Synonyms: bifurcate, branched, forficate, fork-like, forked, pronged, prongy |
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| bituminous | (adjective) resembling or containing bitumen | - |
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| blasphemous | (adjective) characterized by profanity or cursing | Synonyms: blue, profane |
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| (adjective) grossly irreverent toward what is held to be sacred | Synonyms: profane, sacrilegious |
| blusterous | (adjective) blowing in violent and abrupt bursts | Synonyms: blustering, blustery |
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| bodacious | (adjective) unrestrained by convention or propriety | Synonyms: audacious, bald-faced, barefaced, brassy, brazen-faced, brazen, insolent |
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| (adjective) incorrigible | - |
| bogus | (adjective) fraudulent; having a misleading appearance | Synonyms: bastard, fake, phoney, phony |
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| boisterous | (adjective) noisy and lacking in restraint or discipline | Synonyms: rambunctious, robustious, rumbustious, unruly |
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| (adjective) full of rough and exuberant animal spirits | Synonyms: knockabout |
| (adjective) violently agitated and turbulent | Synonyms: fierce, rough |
| bolus | (noun) a large pill; used especially in veterinary medicine | - |
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| (noun) a small round soft mass (as of chewed food) | - |
| bonus | (noun) anything that tends to arouse | Synonyms: fillip |
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| (noun) an additional payment (or other remuneration) to employees as a means of increasing output | Synonyms: incentive |
| botulinus | (noun) anaerobic bacterium producing botulin the toxin that causes botulism | Synonyms: botulinum, Clostridium botulinum |
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| bounteous | (adjective) given or giving freely | Synonyms: big, bighearted, bountiful, freehanded, giving, handsome, liberal, openhanded |
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| brachiopodous | (adjective) of or belonging to the phylum Brachiopoda | Synonyms: brachiopod |
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| brachydactylous | (adjective) having abnormally short finger or toes | Synonyms: brachydactylic |
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| brachypterous | (adjective) (especially of certain insects) having very short or rudimentary wings | Synonyms: short-winged |
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| brachyurous | (adjective) of or belonging to the suborder Brachyura | - |
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| branchiopodous | (adjective) of or relating to or characteristic of the subclass Branchiopoda | Synonyms: branchiopod, branchiopodan |
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| bronchus | (noun) either of the two main branches of the trachea | Synonyms: bronchial tube |
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| brontosaurus | (noun) huge quadrupedal herbivorous dinosaur common in North America in the late Jurassic | Synonyms: apatosaur, apatosaurus, Apatosaurus excelsus, brontosaur, thunder lizard |
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| brumous | (adjective) filled or abounding with fog or mist | Synonyms: foggy, hazy, misty |
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| bryanthus | (noun) procumbent Old World mat-forming evergreen shrub with racemes of pinkish-white flowers | - |
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| bulbaceous | (adjective) producing or growing from bulbs | - |
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| bulbous | (adjective) curving outward | Synonyms: bellied, bellying, bulging, bulgy, protuberant |
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| (adjective) shaped like a bulb | Synonyms: bulb-shaped, bulblike |
| bumptious | (adjective) offensively self-assertive | Synonyms: self-assertive |
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| bunyavirus | (noun) an animal virus belonging to the family Bunyaviridae; can be used as a bioweapon | - |
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| burglarious | (adjective) involving or resembling burglary | - |
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| burnous | (noun) a long hooded cloak woven of wool in one piece; worn by Arabs and Moors | Synonyms: burnoose, burnouse |
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| bus | (noun) a vehicle carrying many passengers; used for public transport | Synonyms: autobus, charabanc, coach, double-decker, jitney, motorbus, motorcoach, omnibus, passenger vehicle |
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| (noun) a car that is old and unreliable | Synonyms: heap, jalopy |
| (noun) an electrical conductor that makes a common connection between several circuits | Synonyms: busbar |
| (noun) the topology of a network whose components are connected by a busbar | Synonyms: bus topology |
| (verb) remove used dishes from the table in restaurants | - |
| (verb) ride in a bus | - |
| (verb) send or move around by bus | - |
| butyraceous | (adjective) having the qualities of butter or yielding or containing a substance like butter | - |
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| byssus | (noun) tuft of strong filaments by which e.g. a mussel makes itself fast to a fixed surface | Synonyms: beard |
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| cabassous | (noun) naked-tailed armadillo of tropical South America | Synonyms: Cabassous unicinctus, tatouay |
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| cacophonous | (adjective) having an unpleasant sound | Synonyms: cacophonic |
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| cactus | (noun) any succulent plant of the family Cactaceae native chiefly to arid regions of the New World and usually having spines | - |
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| cadaverous | (adjective) of or relating to a cadaver or corpse | Synonyms: cadaveric |
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| (adjective) very thin especially from disease or hunger or cold | Synonyms: emaciated, gaunt, haggard, pinched, skeletal, wasted |
| caduceus | (noun) an insignia used by the medical profession; modeled after the staff of Hermes | - |
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| caducous | (adjective) shed at an early stage of development | Synonyms: shed |
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| calamitous | (adjective) (of events) having extremely unfortunate or dire consequences; bringing ruin | Synonyms: black, disastrous, fatal, fateful |
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| calamus | (noun) the hollow spine of a feather | Synonyms: quill, shaft |
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| (noun) any tropical Asian palm of the genus Calamus; light tough stems are a source of rattan canes | - |
| (noun) perennial marsh plant having swordlike leaves and aromatic roots | Synonyms: Acorus calamus, flagroot, myrtle flag, sweet calamus, sweet flag |
| (noun) the aromatic root of the sweet flag used medicinally | - |
| calcaneus | (noun) the largest tarsal bone; forms the human heel | Synonyms: heelbone, os tarsi fibulare |
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| calcareous | (adjective) composed of or containing or resembling calcium carbonate or calcite or chalk | Synonyms: chalky |
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| calceus | (noun) a shoe covering the ankle; worn by ancient Romans | - |
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| calcicolous | (adjective) growing or living in soil rich in lime | - |
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| calciferous | (adjective) bearing or producing or containing calcium or calcium carbonate or calcite | - |
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| calcifugous | (adjective) growing or living in acid soil | - |
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| calculous | (adjective) relating to or caused by or having a calculus or calculi | - |
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| 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 |
| 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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| caliginous | (adjective) dark and misty and gloomy | - |
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| callipygous | (adjective) pertaining to or having finely developed buttocks | Synonyms: callipygian |
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| callous | (adjective) emotionally hardened | Synonyms: indurate, pachydermatous |
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| (adjective) having calluses; having skin made tough and thick through wear | Synonyms: calloused, thickened |
| (verb) make insensitive or callous; deaden feelings or morals | Synonyms: cauterise, cauterize |
| callus | (noun) (botany) an isolated thickening of tissue, especially a stiff protuberance on the lip of an orchid | - |
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| (noun) bony tissue formed during the healing of a fractured bone | - |
| (noun) an area of skin that is thick or hard from continual pressure or friction (as the sole of the foot) | Synonyms: callosity |
| (verb) form a callus or calluses | - |
| (verb) cause a callus to form on | - |
| calumnious | (adjective) (used of statements) harmful and often untrue; tending to discredit or malign | Synonyms: calumniatory, defamatory, denigrating, denigrative, denigratory, libellous, libelous, slanderous |
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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 |
| camphoraceous | (adjective) being or having the properties of camphor | - |
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| campus | (noun) a field on which the buildings of a university are situated | - |
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| campylotropous | (adjective) (of a plant ovule) curved with the micropyle near the base almost touching its stalk | - |
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| canaliculus | (noun) a small canal or duct as in some bones and parts of plants | - |
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| cancellous | (adjective) having an open or latticed or porous structure | Synonyms: cancellate, cancellated |
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| cancerous | (adjective) like a cancer; an evil that grows and spreads | - |
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| (adjective) relating to or affected with cancer | - |
| cankerous | (adjective) having an ulcer or canker | Synonyms: ulcerated, ulcerous |
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| canorous | (adjective) richly melodious | Synonyms: songful |
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| cantankerous | (adjective) having a difficult and contrary disposition | Synonyms: crotchety, ornery |
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| (adjective) stubbornly obstructive and unwilling to cooperate | Synonyms: bloody-minded |
| canthus | (noun) either of the corners of the eye where the upper and lower eyelids meet | - |
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| capacious | (adjective) large in capacity | - |
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| capricious | (adjective) determined by chance or impulse or whim rather than by necessity or reason | Synonyms: impulsive, whimsical |
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| (adjective) changeable | Synonyms: freakish |
| captious | (adjective) tending to find and call attention to faults | Synonyms: faultfinding |
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| carbonaceous | (adjective) relating to or consisting of or yielding carbon | Synonyms: carbonic, carboniferous, carbonous |
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| carboniferous | (adjective) relating to or consisting of or yielding carbon | Synonyms: carbonaceous, carbonic, carbonous |
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| (adjective) of or relating to the Carboniferous geologic era | - |
| carbonous | (adjective) relating to or consisting of or yielding carbon | Synonyms: carbonaceous, carbonic, carboniferous |
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| carcinomatous | (adjective) being or relating to carcinoma | - |
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| carious | (adjective) (of teeth) affected with cavities or decay | - |
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| carnivorous | (adjective) (used of plants as well as animals) feeding on animals | - |
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| (adjective) relating to or characteristic of carnivores | - |
| carpophagous | (adjective) feeding on fruit | Synonyms: fruit-eating |
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| carposporous | (adjective) having carpospores | - |
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| carpus | (noun) a joint between the distal end of the radius and the proximal row of carpal bones | Synonyms: articulatio radiocarpea, radiocarpal joint, wrist, wrist joint |
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| cartilaginous | (adjective) of or relating to cartilage | - |
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| (adjective) difficult to chew | Synonyms: gristly, rubbery |
| carunculous | (adjective) resembling a caruncle | Synonyms: caruncular |
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| caryophyllaceous | (adjective) of or pertaining to plants of the family Caryophyllaceae | - |
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| caseous | (adjective) of damaged or necrotic tissue; cheeselike | - |
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| catadromous | (adjective) migrating from fresh water to the sea to spawn | - |
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| caucus | (noun) a closed political meeting | - |
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| (verb) meet to select a candidate or promote a policy | - |
| cautious | (adjective) showing careful forethought | - |
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| (adjective) avoiding excess | Synonyms: conservative |
| (noun) people who are fearful and cautious | Synonyms: timid |
| cavernous | (adjective) filled with vascular sinuses and capable of becoming distended and rigid as the result of being filled with blood | Synonyms: erectile |
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| (adjective) being or suggesting a cavern | - |
| cementitious | (adjective) like or relevant to or having the properties of cement | - |
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| censorious | (adjective) harshly critical or expressing censure | - |
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| census | (noun) a periodic count of the population | Synonyms: nose count, nosecount |
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| (verb) conduct a census | - |
| ceratodus | (noun) extinct lungfish | - |
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| ceratosaurus | (noun) primitive medium-sized theropod; swift-running bipedal carnivorous dinosaur having grasping hands with sharp claws and a short horn between the nostrils; Jurassic in North America | Synonyms: ceratosaur |
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| ceremonious | (adjective) characterized by pomp and ceremony and stately display | Synonyms: pompous |
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| (adjective) rigidly formal or bound by convention | Synonyms: conventional |
| cernuous | (adjective) having branches or flower heads that bend downward | Synonyms: drooping, nodding, pendulous, weeping |
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| cerous | (adjective) of or relating to or containing cerium with valence 3 | - |
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| ceruminous | (adjective) relating to or secreting cerumen | - |
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| cetaceous | (adjective) of or relating to whales and dolphins etc | Synonyms: cetacean |
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| chaetognathous | (adjective) of or relating to arrowworms | Synonyms: chaetognathan |
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| chancrous | (adjective) of or having chancres | - |
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| chartaceous | (adjective) of or like paper | Synonyms: paperlike, papery |
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| chelicerous | (adjective) having chelicerae | - |
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| cheliferous | (adjective) having chelae | - |
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| chiasmus | (noun) inversion in the second of two parallel phrases | - |
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| chitinous | (adjective) of or resembling chitin | - |
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| chivalrous | (adjective) being attentive to women like an ideal knight | Synonyms: gallant, knightly |
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