Dictionary![]() ![]() vitamin B1,thiamine. vitamin B2,riboflavin. vitamin B6,pyridoxine. vitamin B12,a deep-red crystalline, water-soluble solid, C63H88N14O14PCo, obtained from liver, milk, eggs, fish, oysters, and clams: a deficiency causes pernicious anemia and disorders of the nervous system. Also called cyanocobalamin, cobalamin, extrinsic factor. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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