Also, flavine.

1850–55; flav- + -in2

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a combining form occurring in compound words which denote natural derivatives of flavin: riboflavin.
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
flavin or flavine (ˈfleɪvɪn)
1.  See flavoprotein a heterocyclic ketone that forms the nucleus of certain natural yellow pigments, such as riboflavin. Formula: C10H6N4O2
2.  any yellow pigment based on flavin
3.  another name for quercetin
[C19: from Latin flāvus yellow]
flavine or flavine
[C19: from Latin flāvus yellow]

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

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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Example sentences
For example, red cabbages contain an indicator pigment molecule called flavin, which is a type of molecule called an anthocyanin.
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