Meaning

noun pigment occurring in luminescent organisms (as fireflies); emits heatless light when undergoing oxidation

originEtymology tree Proto-Indo-European *lewk- Proto-Indo-European *-s Proto-Indo-European *léwks Proto-Italic *louks Latin lūx Proto-Indo-European *bʰer- Proto-Indo-European *-ós Proto-Indo-European *bʰorós Proto-Italic *-foros Latin -fer Latin lūcifer Proto-Indo-European *-nós Proto-Indo-European *-iHnos Proto-Italic *-īnos Latin -īnusder. Old French -inbor. Middle English -in English -ineclip.…

Etymology from Wiktionary, CC BY-SA 3.0