12 letters · 17 points in Scrabble
adjective emitting light as a result of being heated
adjective characterized by ardent emotion or intensity or brilliance
originBorrowed from French incandescent, from Latin incandescens, from incandesco (“be heated, glow”), from in- (intensifying prefix) + candesco (“become white”), from candidus (“white”).
Etymology from Wiktionary, CC BY-SA 3.0