photocell

[ foh-toh-sel ]
/ ˈfoʊ toʊˌsɛl /
|

noun Electronics.

a solid-state device that converts light into electrical energy by producing a voltage, as in a photovoltaic cell, or uses light to regulate the flow of current, as in a photoconductive cell: used in automatic control systems for doors, lighting, etc.

Nearby words

  1. photobomb,
  2. photocard,
  3. photocatalysis,
  4. photocatalyst,
  5. photocathode,
  6. photochemical,
  7. photochemical smog,
  8. photochemistry,
  9. photochemotherapy,
  10. photochromic

Origin of photocell

First recorded in 1890–95; photo- + cell1


Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for photocell

  • A fast reading with the photocell gave me the apparent magnitude and a comparison with its absolute magnitude showed its distance.

    The Repairman|Harry Harrison


British Dictionary definitions for photocell

photocell

/ (ˈfəʊtəʊˌsɛl) /

noun

a device in which the photoelectric or photovoltaic effect or photoconductivity is used to produce a current or voltage when exposed to light or other electromagnetic radiation. They are used in exposure meters, burglar alarms, etcAlso called: photoelectric cell, electric eye
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Science definitions for photocell

photocell

[ fōtō-sĕl′ ]

See photoresistor.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.