flavin flavid • flavine · · · Info · Definitions · Characters · · flavin · · Text Latin · · Script 6 · · Length Definitions · · · (noun) a ketone that forms the nucleus of certain natural yellow pigments like riboflavin. · · Noun Definition 1 Characters · · a latin small letter a U+0061 f latin small letter f U+0066 i latin small letter i U+0069 l latin small letter l U+006C n latin small letter n U+006E v latin small letter v U+0076