A complex of cyanide and cobalamin, as in vitamin B12, in which a cyanide group has filled the sixth coordinate position of the cobalt atom.
- radioactive c. cyano[57Co]cobalamin, cyano[58Co]cobalamin, or cyano[60Co]cobalamin produced by the growth of certain microorganisms on a medium containing cobalt-57, cobalt-58, or cobalt-60; used in the investigation of the absorption and metabolism of c. (vitamin B12).
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cy·a·no·co·bal·a·min (si″ə-no″ko-balґə-min) 1. a cobalamin derivative in which the substituent is a cyanide ion; it is the form of vitamin B12 first isolated and hence is the form chemically defined as and the form used as a synonym of that vitamin, although it is actually an artifact of isolation. 2. [USP] a preparation of cyanocobalamin used to treat disorders caused by deficiencies of vitamin B12, particularly to prevent and treat pernicious anemia and other megaloblastic anemias and associated neuropathy; administered subcutaneously or intramuscularly, intranasally, or, occasionally, orally. Abbreviated CN-Cbl. Called also vitamin B12>.Medical dictionary. 2011.