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photodetector

[foh-toh-di-tek-ter] /ˈfoʊ toʊ dɪˌtɛk tər/
noun
2.
Electronics. any device, as a photodiode, phototube, or photovoltaic cell, that uses the photoelectric effect to convert radiant energy into an electrical signal.
Origin
1945-1950
1945-50; photo- + detector
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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