12-letter words containing c, a, b, o
- bioacoustics — the study of animals' use of sound
- biographical — Biographical facts, notes, or details are concerned with the events in someone's life.
- bioinorganic — pertaining to the biological activity of metal complexes and nonmetal compounds based on elements other than carbon (contrasted with bioorganic).
- biologically — pertaining to biology.
- biomagnetics — the study of magnetic fields as a form of therapy
- biomechanics — the study of the mechanics of the movement of living organisms
- biometrician — a person who is knowledgeable about biometry
- biomolecular — relating to a biomolecule
- biotechnical — relating to biotechnology
- bishop's-cap — any of a genus (Mitella) of small woodland plants of the saxifrage family, with two-lobed seedcases shaped like a bishop's hat
- black bottom — a dance of the late 1920s that originated in America, involving a sinuous rotation of the hips
- black bryony — a climbing herbaceous Eurasian plant, Tamus communis, having small greenish flowers and poisonous red berries: family Dioscoreaceae
- black canyon — a canyon of the Colorado River between Arizona and Nevada: site of Boulder Dam.
- black coffee — coffee with no milk, milk substitute, or cream added
- black cohosh — a plant of the ranunculaceous family, Cimicifuga racemosa, which is used as a natural alternative to hormone replacement therapy
- black comedy — a comedy dealing with an unpleasant situation in a pessimistic or macabre manner
- black copper — a regulus of 95-percent-pure copper, produced in a blast furnace by smelting oxidized copper ores.
- black cosmos — a garden plant, Cosmos diversifolius, of Mexico, having small, dahlialike tubers and solitary flower heads with red disk flowers and velvety, dark-red or purplish ray flowers.
- black forest — wooded mountain region in SW Germany
- black grouse — a large N European grouse, Lyrurus tetrix, the male of which has a bluish-black plumage and lyre-shaped tail
- black heroin — a very potent and addictive form of heroin that is dark-colored.
- black liquor — (in making wood pulp for paper) the liquor that remains after digestion.
- black locust — Also called false acacia, yellow locust. a North American tree, Robinia pseudoacacia, of the legume family, having pinnate leaves and clusters of fragrant white flowers.
- black poplar — a Eurasian tree, Populus nigra
- black powder — gunpowder as used in sports involving modern muzzleloading firearms
- black sapote — a tropical American tree, Diospyros digyna, related to the persimmon, having sweet, edible, green fruit that turns black when ripe.
- black scoter — a scoter of Eurasia and North America, Melanitta nigra, the adult male of which is black.
- black tongue — canine pellagra.
- black-coated — (esp formerly) (of a worker) clerical or professional, as distinguished from commercial or industrial
- blastocoelic — of or relating to the blastocoel
- blastomycete — any of a genus (Blastomyces) of yeastlike imperfect fungi that cause diseases in people and animals
- block caving — a method of mining a large block of ore by systematically undercutting so the ore will cave. Compare cave (def 5a).
- block heater — an electrically operated immersion heater fitted either to enter the water hose or the water jacket surrounding the cylinder block of a motor to warm the coolant in cold weather.
- block island — an island off the coast of and a part of Rhode Island, at the E entrance to Long Island Sound.
- block signal — a fixed railroad signal governing the movements of trains entering and using a given section of track.
- board school — (formerly) a school managed by a board elected by local ratepayers
- bobbery pack — a mixed pack of hunting dogs, often not belonging to any of the hound breeds
- body fascism — intolerance of those whose bodies do not conform to a particular view of what is desirable
- body scanner — a machine using X-rays and a computer, used in medicine to look for signs of disease, or in security operations to look for drugs, weapons, etc
- boghead coal — compact bituminous coal that burns brightly and yields large quantities of tar and oil upon distillation.
- boletic acid — fumaric acid.
- bomb factory — a site or building in which terrorists illicitly and secretly create bombs
- bombacaceous — of, relating to, or belonging to the Bombacaceae, a family of tropical trees, including the kapok tree and baobab, that have very thick stems, often with water-storing tissue
- bombe glacée — a dessert of ice cream lined or filled with custard, cake crumbs, etc
- boniface iii — pope a.d. 607.
- boniface vii — antipope a.d. 974, 984–985.
- bonne chance — good luck
- bonnyclabber — clotted or curdled milk
- book matches — safety matches made of paper and fastened into a small cardboard folder
- boot-scraper — a contraption consisting of an upright metal shape formerly placed outside some houses to enable people to scrape the mud from their boots before going in