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[pir-i-dok-seen, -sin] /ˌpɪr ɪˈdɒk sin, -sɪn/
noun, Biochemistry
a derivative of pyridine, C 8 H 1 1 NO 3 , occurring in whole-grain cereals, meats, fish, etc., and also made synthetically: required for the prevention of pellagra and the formation of hemoglobin; vitamin B 6 .
Also, pyridoxin
[pir-i-dok-sin] /ˌpɪr ɪˈdɒk sɪn/ (Show IPA)
1935-40; pyrid(ine) + ox(ygen) + -ine2 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for pyridoxine
  • Not to mention pyridoxine hydrochloride and tocopherols.
British Dictionary definitions for pyridoxine


(biochem) a derivative of pyridine that is a precursor of the compounds pyridoxal and pyridoxamine Also vitamin B6
Word Origin
C20: from pyrid(ine) + ox(ygen) +-ine²
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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pyridoxine in Medicine

pyridoxine pyr·i·dox·ine (pĭr'ĭ-dŏk'sēn, -sĭn) or pyr·i·dox·in (-dŏk'sĭn)
A pyridine derivative occurring especially in cereals, yeast, liver, and fish and serving as a coenzyme in amino acid synthesis.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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pyridoxine in Science
A pyridine derivative that is the main form of vitamin B6. Chemical formula: C8H11NO3.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Encyclopedia Article for pyridoxine

water-soluble organic compound that is an essential micronutrient for microorganisms and animals. It occurs in three forms: pyridoxine (or pyridoxol), pyridoxal, and pyridoxamine. Pyridoxine was first isolated in 1938 and synthesized in 1939. Pyridoxal and pyridoxamine, which were discovered in the 1940s, are responsible for most of the vitamin B6 activity in animal tissues. Vitamin B6 is widely distributed in foodstuffs and is particularly abundant in cereal grains, meats, nuts, and some fruits and vegetables. The chemical structure of the vitamin B6 family is as follows:

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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