/ Dictionary / Index F flavin: Meaning and Definition of Find definitions for: fla•vin Pronunciation: (flā'vin), [key] — n. Biochem. a complex heterocyclic ketone that is common to the nonprotein part of several important yellow enzymes, the flavoproteins. quercetin. -flavin Pronunciation: [key] a combining form occurring in compound words which denote natural derivatives of flavin: riboflavin. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: flavin (Thesaurus) Flavia flavine Related Content Daily Word Quiz: feline Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language