vitamin B12

vitamin B12

noun
a deep-red crystalline, water-soluble solid, C 63 H 88 N 14 O 14 PCo, obtained from liver, milk, eggs, fish, oysters, and clams: a deficiency causes pernicious anemia and disorders of the nervous system.


Origin:
1945–50

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Collins
World English Dictionary
vitamin B12
 
n
another name for cyanocobalamin

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

vitamin B12 n.
A complex compound containing cobalt, found especially in liver and widely used to treat pernicious anemia. Also called 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.
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American Heritage
Science Dictionary
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 © 2002. Published by Houghton Mifflin. All rights reserved.
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