photoelectric cell

noun Electronics.

Origin:
1890–95

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Collins
World English Dictionary
photoelectric cell
 
n
another name for photocell

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Science Dictionary
photoelectric cell  
An electronic device having an electrical output that varies in response to the strength of incident electromagnetic radiation, especially visible light. Photoelectric cells make use of the photoelectric effect, in which electrons are displaced by photons in substances such as silicon or selenium to generate a voltage in response to radiation. Photoelectric cells are used to detect light electronically in cameras and night vision apparatus and to generate electrical power in solar cells. Also called photovoltaic cell. See also solar cell.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
He gasped at a display in which a flashlight illuminated a photoelectric cell,
  creating a crackling sound.
Each light is equipped with a photoelectric cell that senses the amount of
  daylight.
Some traps are available with a photoelectric cell that turns the light on at
  dusk and off at dawn.
Particles in the gas stream absorb or scatter the light and reduce the signal
  at the photoelectric cell.
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