luciferin Luciferidae • luciferoid · · · Info · Definitions · Characters · · luciferin · · Text Latin · · Script 9 · · Length Definitions · · · (noun) pigment occurring in luminescent organisms (as fireflies); emits heatless light when undergoing oxidation. · · Noun Definition 1 Characters · · c latin small letter c U+0063 e latin small letter e U+0065 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 r latin small letter r U+0072 u latin small letter u U+0075