LUMINESCENCE
luminescence, glow
(noun) light from nonthermal sources
luminescence
(noun) light not due to incandescence; occurs at low temperatures
Source: WordNet® 3.1
Etymology
Noun
luminescence (countable and uncountable, plural luminescences)
(physics) Any emission of light that cannot be attributed merely to the temperature of the emitting body.
Source: Wiktionary
Lu`mi*nes"cence, n. [See Luminescent.]
1. (Physics) Any emission of light not ascribable directly to
incandescence, and therefore occurring at low temperatures, as in
phosphorescence and fluorescence or other luminous radiation
resulting from vital processes, chemical action, friction, solution,
or the influence of light or of ultraviolet or cathode rays, etc.
2. (Zoöl.)
(a) The faculty or power of voluntarily producing light, as in the
firefly and glowworm.
(b) The light thus produced; luminosity; phosphorescence.
Source: Webster’s Unabridged Dictionary 1913 Edition