The document defines and provides the etymology of the word "incandescent". It begins by listing definitions from the Oxford English Dictionary describing something that glows brightly from heat or intense feeling. It then traces the word to its Latin roots of "kindle" and "become white" or "to shine". Subsequent definitions from dictionaries and a breakdown of the word's morphemes provide further linguistic context for the original and current meaning of "incandescent" as glowing or shining intensely from heat or passion.