The definition of luminescence is light given off by something without obtaining or generating heat.
An example of luminescence is fluorescence, the light that a fluorescent bulb produces.
any giving off of light caused by the absorption of radiant or corpuscular energy and not by incandescence; any cold light; specif., fluorescence or phosphorescence occurring in various chemical, biological, electrical, etc. processes at relatively low temperatures
Origin of luminescence; from Classical Latin lumen, light + -escence
- The emission of light that does not derive energy from the temperature of the emitting body, as in phosphorescence, fluorescence, and bioluminescence. Luminescence is caused by chemical, biochemical, or crystallographic changes, the motions of subatomic particles, or radiation-induced excitation of an atomic system.
- The light so emitted.