[ pir-i-dok-seen, -sin ]
/ ˌpɪr ɪˈdɒk sin, -sɪn /

noun Biochemistry.

a derivative of pyridine, C8H11NO3, occurring in whole-grain cereals, meats, fish, etc., and also made synthetically: required for the prevention of pellagra and the formation of hemoglobin; vitamin B6.
Also pyr·i·dox·in [pir-i-dok-sin] /ˌpɪr ɪˈdɒk sɪn/.

Origin of pyridoxine

First recorded in 1935–40; pyrid(ine) + ox(ygen) + -ine2 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

British Dictionary definitions for pyridoxine

/ (ˌpɪrɪˈdɒksiːn) /


biochem a derivative of pyridine that is a precursor of the compounds pyridoxal and pyridoxamineAlso: vitamin B 6

Word Origin for pyridoxine

C20: from pyrid (ine) + ox (ygen) + -ine ²
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

Medical definitions for pyridoxine

[ pĭr′ĭ-dŏksēn, -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.

Scientific definitions for pyridoxine

[ pĭr′ĭ-dŏksēn ]

A pyridine derivative that is the main form of vitamin B6. Chemical formula: C8H11NO3.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.