vitamin b

vitamin B1

noun

Origin:
1920–25

Dictionary.com Unabridged

vitamin B2

noun

Origin:
1925–30

vitamin B3

vitamin B6

noun

Origin:
1930–35

vitamin B9

noun

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

nicotinic acid

noun Biochemistry.
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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Collins
World English Dictionary
nicotinic acid
 
n
Also called: niacin 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

vitamin B
 
n , pl B vitamins
any of the vitamins in the vitamin B complex

vitamin B1
 
n
another name for thiamine

vitamin B2
 
n
another name for riboflavin

vitamin B6
 
n
another name for pyridoxine

vitamin B12
 
n
another name for cyanocobalamin

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

nicotinic acid n.
See niacin.

vitamin B n.

  1. Vitamin B complex.

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

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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American Heritage
Science Dictionary
nicotinic acid   (nĭk'ə-tĭn'ĭk, -tē'nĭk)  Pronunciation Key 
See niacin.
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.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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