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photoactive
photoautotroph
photobiology
photobiotic
photoblastic
photocall
photocatalysis
photocathode
photocell
photochemical
photochemical smog
photochemistry
photochemotherapy
photochromic
photocoagulation
photocomposition
photoconduction
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photodiode
pho·to·di·ode [ ftō dd ] (plural pho·to·di·odes)


noun 
Definition:
 
semiconductor used to detect light: a semiconductor device in which the flow of current is controlled by the intensity of light and that can therefore be used to detect light
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