/ Dictionary / Index L luminescence: Meaning and Definition of Find definitions for: lu•mi•nes•cence Pronunciation: (l"mu-nes'uns), [key] — n. the emission of light not caused by incandescence and occurring at a temperature below that of incandescent bodies. the light produced by such an emission. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: luminescence (Thesaurus) luminesce luminiferous Related Content Daily Word Quiz: tenacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language