12-letter words containing o, c, a, s
- biomagnetics — the study of magnetic fields as a form of therapy
- biomechanics — the study of the mechanics of the movement of living organisms
- 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 cohosh — a plant of the ranunculaceous family, Cimicifuga racemosa, which is used as a natural alternative to hormone replacement therapy
- 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 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 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.
- 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 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
- 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
- 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
- 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
- borosilicate — a salt of boric and silicic acids
- bounce flash — a flash lamp designed to produce a bounced flash.
- box lacrosse — a form of lacrosse played indoors, usually on a hockey rink with a wooden floor, between two teams of six players.
- brachycerous — (of insects) having short antennae
- braggadocios — empty boasting; bragging.
- brass-collar — unwaveringly faithful to a political party; voting the straight ticket: a brass-collar Democrat.
- broadcasting — Broadcasting is the making and sending out of television and radio programmes.
- broca's area — the region of the cerebral cortex of the brain concerned with speech; the speech centre
- bronchospasm — an abnormal contraction of the bronchi resulting in restriction of the airway
- bunco artist — a confidence trickster or con artist
- burseraceous — of, relating to, or belonging to the Burseraceae, a tropical family of trees and shrubs having compound leaves and resin or balsam in their stems. The family includes bdellium and some balsams
- cabbage rose — a rose, Rosa centifolia, with a round compact full-petalled head
- cabora bassa — the site on the Zambezi River in N Mozambique of the largest dam in southern Africa
- cabot strait — a channel in Canada, connecting the Gulf of St. Lawrence with the Atlantic Ocean. 68 miles (109 km) wide.
- cacophonious — cacophonous
- cactoblastis — a moth, Cactoblastis cactorum of South America, that was introduced into Australia to act as a biological control on the prickly pear
- cadaverously — In a cadaverous manner.
- cadent house — any of the four houses that precede the angles: the third, sixth, ninth, and twelfth houses, which correspond, respectively, to neighborhood and relatives, work and health, philosophy and foreign travel, and secret matters and service to others.
- cadet school — a training establishment for cadets in the army
- caenogenesis — the development of structures and organs in an embryo or larva that are adaptations to its way of life and are not retained in the adult form
- caesalpinoid — of, relating to, or belonging to the Caesalpinoideae, a mainly tropical subfamily of leguminous plants that have irregular flowers: includes carob, senna, brazil, cassia, and poinciana
- cafe society — people, esp intellectuals and artists who meet in cafés
- calamitously — In a calamitous manner.
- calcareously — in a calcareous manner
- calculations — Plural form of calculation.
- calibrations — Plural form of calibration.
- caliginosity — darkness
- call to arms — a command to report for active military duty.
- calorescence — the absorption of radiation by a body, subsequently re-emitted at a higher frequency (lower wavelength)
- calorimeters — Plural form of calorimeter.