Definition of luminescence

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lu·mi·nes·cence

-n

ns) KEY

NOUN:

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.

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