Definition of photoelectric cell noun from the Oxford Advanced Learner's Dictionary


photoelectric cell

BrE BrE//ˌfəʊtəʊɪˌlektrɪk ˈsel//
; NAmE NAmE//ˌfoʊtoʊɪˌlektrɪk ˈsel//
(also photocell) The power industry, Devices
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an electric device that uses a stream of light. When the stream is broken it shows that somebody/something is present, and can be used to control alarms, machinery, etc. See related entries: The power industry, Devices
See the Oxford Advanced American Dictionary entry: photoelectric cell