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[fley-vin] /ˈfleɪ vɪn/
noun, Biochemistry.
a complex heterocyclic ketone that is common to the nonprotein part of several important yellow enzymes, the flavoproteins.
Also, flavine.
Origin of flavin
First recorded in 1850-55; flav- + -in2


a combining form occurring in compound words which denote natural derivatives of flavin:
riboflavin. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for flavin
Contemporary Examples
Historical Examples
  • flavin observed a duck, which he thought to be of this species, at Guam on January 19, 1946.

  • To obtain a yellow shade of scarlet, a small quantity of flavin, Fustic, or other yellow dye may be added to the dye bath.

    Vegetable Dyes

    Ethel M. Mairet
  • flavin is extract of Quercitron bark, and is much used for bright yellow with tin.

    Vegetable Dyes

    Ethel M. Mairet
  • Yellows can be got with weld, flavin, turmeric (for which cotton has a strong attraction), and fustic.

    Vegetable Dyes

    Ethel M. Mairet
  • flavin, add both to the bath together with indigo extract (1/2 tablespoonful).

    Vegetable Dyes

    Ethel M. Mairet
  • From his seat below the Gangway Mr. flavin watched procedure with wistful eyes.

British Dictionary definitions for flavin


a heterocyclic ketone that forms the nucleus of certain natural yellow pigments, such as riboflavin. Formula: C10H6N4O2 See flavoprotein
any yellow pigment based on flavin
another name for quercetin
Word Origin
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
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flavin in Medicine

flavin fla·vin (flā'vĭn) or fla·vine (-vēn')

  1. Any of various water-soluble yellow pigments, including riboflavin, found in plant and animal tissue as coenzymes of flavoproteins.

  2. 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.
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