15 letters · 23 points in Scrabble
noun luminescence produced by physiological processes (as in the firefly)
originEtymology tree Proto-Indo-European *gʷeyh₃-der. Ancient Greek βῐ́ος (bĭ́os) Ancient Greek βῐο- (bĭo-)der. English bio- Latin lumen Proto-Indo-European *-éh₁ti Proto-Indo-European *-sḱéti Proto-Indo-European *-éh₁sḱeti Proto-Italic *-ēskō Latin -ēscō Latin -escensder. English -escence English luminescence English bioluminescence From bio- + luminescence.
Etymology from Wiktionary, CC BY-SA 3.0