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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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 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 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.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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