luminescence luminesce • luminescent · · · Info · Definitions · Synonyms · Characters · · luminescence · · Text Latin · · Script 12 · · Length Definitions · · · (noun) light not due to incandescence; occurs at low temperatures. · · Noun Definition 1 (noun) light from nonthermal sources. Synonyms: glow. · · Noun Definition 2 Synonyms · · · glow · · Synonym 1 Characters · · c latin small letter c U+0063 e latin small letter e U+0065 i latin small letter i U+0069 l latin small letter l U+006C m latin small letter m U+006D n latin small letter n U+006E s latin small letter s U+0073 u latin small letter u U+0075