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photomosaic
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photoluminescence
pho·to·lu·mi·nes·cence [ ftō loomə néss'nss ]


noun 
Definition:
 
luminescence stimulated by light absorption: the emission of light from a substance as a result of the absorption of electromagnetic radiation. The frequency of the light emitted is lower than that absorbed.

pho·to·lu·mi·nes·cent adjective
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