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

• In the presence of moisture luciferin oxidizes, forming oxy-luciferin, the substance which actually glows.
• He intends to detach their luminous posteriors and extract from them luciferina substance which fascinates many scientists.
• Many luminescent creatures secrete an easily oxidizable compound, luciferin, which is oxidized with the help of an enzyme, luciferase.