luminescence

luminescence /lu·mi·nes·cence/ (loo″mĭ-nes´ens) the property of giving off light without a corresponding degree of heat.

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lu·mi·nes·cence (lm-nsns)

n.

1. The emission of light that does not derive energy from the temperature of the emitting body, as in fluorescence and bioluminescence.

2. The light so emitted.

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luminescence

[lo̅o̅′mines′əns]

Etymology: L, lumen, light, escens, beginning

1 the emission of light by a material after excitation by some stimulus.

2 the emission of light by intensifying-screen phosphors after x-ray interaction. See also thermoluminescent dosimetry.

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luminescence,

n 1. the emission of light by a material after excitation by some stimulus.
2. the emission of light by intensifying screen phosphors after radiographic interaction.

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luminescence

the property of giving off light without a corresponding degree of heat.

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luminescence

Emission of light by certain substances resulting from the absorption of energy (e.g. from electrical fields, chemical reaction, or other light), which is not due to a rise in temperature (unlike incandescence). The emitted radiation is characteristic of the particular substance. When the light emitted is due to exposure to a source of light the process is usually called photoluminescence. When the light emitted is due to either a high-frequency discharge through a gas, or to an electric field through certain solids such as phosphor which is used in fluorescent lamps, television picture tubes, etc., it is called electroluminescence. See bioluminescence; fluorescence; incandescence; fluorescent lamp; phosphorescence.