01 n. The quality or state of being phosphorescent.
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1.
The quality or state of being phosphorescent.
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2.
The process of phosphorescing, especially that of emitting light after a source of excitation has been removed. This contrasts with the process of fluorescence, in which a substance emits light of a lower wavelength than the illuminating light, only while the illumination continues.
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3.
Light emitted by the process of phosphorescence.