vitamin B12
noun
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.
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Origin of vitamin B12
First recorded in 1945–50
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Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for vitamin b12
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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Medicine definitions for vitamin b12
vitamin B12
n.
A complex compound containing cobalt, found especially in liver and widely used to treat pernicious anemia.antipernicious anemia factor cobalamin cyanocobalamin extrinsic factor
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Science definitions for vitamin b12
vitamin B12
A water-soluble, complex organic compound containing cobalt, found especially in meat, liver, eggs, milk, and milk products. Vitamin B12 is necessary for the synthesis of DNA by the body, for the production of blood cells, and for maintaining the health of nerves. A deficiency of vitamin B12 in the diet results in pernicious anemia. Also called cobalamin cyanocobalamin
The American Heritage® Science Dictionary
Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.