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12-letter words containing os

  • asbestos mat — a heat-proof mat
  • astigmoscope — astigmatoscope.
  • at all costs — If you say that something must be avoided at all costs, you are emphasizing that it must not be allowed to happen under any circumstances.
  • atactostelic — Of or possessing an atactostele.
  • atholl brose — a mixture of whisky and honey left to ferment before consumption
  • athos, mount — autonomous monastic district occupying the tip of the easternmost prong of the Chalcidice peninsula, NE Greece: 130 sq mi (337 sq km); pop. 1,500
  • athrocytosis — the capability of a cell to receive and store matter
  • atmospherics — Atmospherics are elements in something such as a piece of music or a book which create a certain atmosphere.
  • atmospherium — an optical system used to simulate images of atmospheric phenomena, as cloud formations, storms, and day and night, on the inside of a dome.
  • autoexposure — A device that sets the exposure automatically on a camera or other piece of equipment.
  • autohypnosis — the process or result of self-induced hypnosis
  • avitaminosis — any disease caused by a vitamin deficiency in the diet
  • b chromosome — a type of densely staining chromosome of uncertain biological function, found in many plant and animal species.
  • backcrossing — (genetics) The crossing of a hybrid with one of its parents or an individual genetically similar to its parent.
  • bacteriostat — any substance that arrests the growth or reproduction of bacteria but does not kill them
  • bank deposit — money placed in a bank account
  • banksia rose — a climbing rose, Rosa banksiae, native to China, having long, serrated leaves and white or yellow flowers.
  • barbados nut — an ornamental, tropical American tree, Jatropha curcas, of the spurge family, having ivylike leaves, small, yellow or greenish-yellow flowers, and olive-shaped fruit yielding a purgative, poisonous oil.
  • barbarossa i — (Aruj) died 1518, Barbary pirate, born in Greece.
  • basidiospore — one of the spores, usually four in number, produced in a basidium
  • be at a loss — If you say that you are at a loss, you mean that you do not know what to do in a particular situation.
  • be let loose — If you say that someone has been let loose in a place or situation, you mean that they have been given complete freedom to do what they like in that place or situation, and you suggest that this may be risky.
  • bed of roses — If you say that a situation is not a bed of roses, you mean that it is not as pleasant as it seems, and that there are some unpleasant aspects to it.
  • binding post — one of several metal pegs or rods, fitted into a loose-leaf binder, for holding sheets with prepunched holes.
  • biocorrosion — corrosion caused by or enhanced by bacteria or other microorganisms; biologically induced corrosion.
  • biosatellite — an artificial satellite for carrying living organisms
  • bioscientist — any science that deals with the biological aspects of living organisms.
  • biosociology — the study of the evolution of social forms and the development of social behavior in terms analogous to or correlated with biological studies.
  • biosynthesis — the formation of complex compounds from simple substances by living organisms
  • biosynthetic — of, relating to, or characterized by biosynthesis, the formation of chemical compounds by a living organism, or a laboratory process modeled after these reactions in living organisms.
  • 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.
  • blanket toss — a game in which a person is repeatedly tossed into the air and caught on an open blanket by a group of people who hold the blanket at its edges and stretch and relax it for each toss and catch.
  • blastosphere — blastula
  • blind-emboss — blind-stamp.
  • blossom into — the flower of a plant, especially of one producing an edible fruit.
  • bog rosemary — any of several species (genus Andromeda) of evergreen shrubs of the heath family, native to cold bogs of North America and Europe, with pink flowers and narrow leaves
  • bois de rose — a grayish red or dark purplish red color.
  • bookcrossing — the practice of deliberately leaving books in places where they will be found and read by other people
  • booster dose — a supplementary injection of a vaccine given to maintain the immunization provided by an earlier dose
  • booster pump — A booster pump is a pump which is used where pressure is low and needs to be increased.
  • booster seat — A booster seat or a booster cushion is a special seat which allows a small child to sit in a higher position, for example at a table or in a car.
  • booster shot — an injection of a vaccine or other antigen some time after the initial series of injections, for maintaining immunity
  • borosilicate — a salt of boric and silicic acids
  • boskop skull — a portion of a human skull found in South Africa, of undetermined relationship and geological age: formerly associated with a hypothetical Boskop race
  • bosom friend — an intimate friend
  • bossier city — city in NW La., on the Red River opposite Shreveport: pop. 56,000
  • bourbon rose — a hybrid rose, Rosa borboniana, having dark, carmine-colored flowers, cultivated in many horticultural varieties.
  • box lacrosse — a form of lacrosse played indoors, usually on a hockey rink with a wooden floor, between two teams of six players.
  • braggadocios — empty boasting; bragging.
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