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photomechanical
photometry
photomicrograph
photomontage
photomosaic
photomultiplier
photon
photonegative
photonics
photonuclear
photoperiod
photoperiodism
photopheresis
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photoreception
pho·to·re·cep·tion [ ftō ri sépsh'n ]


noun 
Definition:
 
perception of light: the perception, absorption, and use of light, e.g. for vision in animals or photosynthesis in plants

pho·to·re·cep·tive [ ftō ri séptiv ] adjective
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