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vitamin B1

noun
1.
Origin
1920-1925
1920-25

vitamin B2

noun
Origin
1925-30

vitamin B3

noun

vitamin B6

noun
Origin
1930-35

vitamin B9

noun

vitamin B12

noun
1.
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

nicotinic acid

noun, Biochemistry
1.
a crystalline acid, C 6 H 5 NO 2 , that is a component of the vitamin-B complex, found in fresh meat, yeast, etc., produced by the oxidation of nicotine, and used in the prevention and treatment of pellagra.
Also called niacin, vitamin B3.
Origin
1885-90
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for vitamin b

vitamin B

noun (pl) B vitamins
1.
any of the vitamins in the vitamin B complex

vitamin B1

noun
1.
another name for thiamine

vitamin B12

noun
1.
another name for cyanocobalamin

vitamin B2

noun
1.
another name for riboflavin

vitamin B6

noun
1.
another name for pyridoxine

nicotinic acid

noun
1.
a vitamin of the B complex that occurs in milk, liver, yeast, etc. Lack of it in the diet leads to the disease pellagra. Formula: (C5H4N)COOH Also called niacin
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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vitamin b in Medicine

vitamin B n.

  1. Vitamin B complex.

  2. A member of the vitamin B complex, especially thiamine.

nicotinic acid n.
See niacin.

vitamin B1 n.
See thiamine.

vitamin B2 n.
See riboflavin.

vitamin B6 n.
Pyridoxine and related compounds.

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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vitamin b in Science
vitamin B  
  1. Vitamin B complex.

  2. A member of the vitamin B complex, especially thiamine (vitamin B1).


vitamin B1  
See thiamine.
vitamin B2  
See riboflavin.
vitamin B6  
Any of several water-soluble pyridine derivatives, especially pyridoxine, that are coenzymes in amino acid synthesis and are important in protein and fat metabolism and in healthy nerve function. Vitamin B6 is found in liver, whole-grain foods, fish, yeast, and many vegetables.
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.
nicotinic acid
  (nĭk'ə-tĭn'ĭk, -tē'nĭk)   
See niacin.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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