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photosensitize
photosphere
photosynthesis
photosynthesize
photosystem
phototaxis
phototherapy
phototoxic
phototransistor
phototropic
phototropism
phototropy
phototube
phototypeset
phototypesetting
photovoltaic
photovoltaic cell
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phototransistor
pho·to·tran·sis·tor [ ftō tran zístər ] (plural pho·to·tran·sis·tors)


noun 
Definition:
 
semiconductor that varies current with illumination: a light-sensitive junction transistor that amplifies the base current as the illumination increases
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