Definitions for luciferinluˈsɪf ər ɪn
Random House Webster's College Dictionary
lu•cif•er•inluˈsɪf ər ɪn(n.)
a pigment of bioluminescent organisms that emits light while being oxidized.
Origin of luciferin:
1885–90; < L lūcifer
pigment occurring in luminescent organisms (as fireflies); emits heatless light when undergoing oxidation
Any of a class of polycyclic heterocycles that are responsible for the bioluminescence of fireflies, being converted to oxyluciferin by luciferase in the process.