Luminescence definition

lo͝omə-nĕsəns
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.

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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.
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The light so emitted.
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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.
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The light so emitted.
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The emission of light as a result of the excitation of atoms by energy other than heat. Bioluminescence, fluorescence, and phosphorescence are examples of luminescence that can be produced by biological or chemical processes.
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The light produced in this way.
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(physics) Any emission of light that cannot be attributed merely to the temperature of the emitting body.
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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.
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Other Word Forms

Noun

Singular:
luminescence
Plural:
luminescences