[ fley-vin ]
/ ˈfleɪ vɪn /
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noun Biochemistry.

a complex heterocyclic ketone that is common to the nonprotein part of several important yellow enzymes, the flavoproteins.



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Also flavine.

Origin of flavin

First recorded in 1850–55; flav- + -in2

Definition for flavin (2 of 2)


a combining form occurring in compound words which denote natural derivatives of flavin: riboflavin.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

Example sentences from the Web for flavin

British Dictionary definitions for flavin



/ (ˈfleɪvɪn) /


a heterocyclic ketone that forms the nucleus of certain natural yellow pigments, such as riboflavin. Formula: C 10 H 6 N 4 O 2See flavoprotein
any yellow pigment based on flavin
another name for quercetin

Word Origin for flavin

C19: from Latin flāvus yellow
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 flavin

[ flāvĭn ]


Any of various water-soluble yellow pigments, including riboflavin, found in plant and animal tissue as coenzymes of flavoproteins.
A ketone that gives color to various natural yellow pigments.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.