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[foh-toh-dahy-ohd] /ˈfoʊ toʊˌdaɪ oʊd/
noun, Electronics.
a photosensitive semiconductor diode.
Origin of photodiode
1940-45; photo- + diode Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for photodiode
  • That's slow enough to be measured by a photodiode and translated by standard electronics into seconds, minutes, and hours.
  • Inside the measuring instrument, a light-emitting diode shines on the film, and a photodiode records the fluctuating fluorescence.
  • Changing the photodiode collector-to-electrode area ratio can control the current density available at each individual photodiode.
British Dictionary definitions for photodiode


a semiconductor diode, the conductivity of which is controlled by incident illumination
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
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photodiode in Science
A diode that exhibits sensitivity to light, either by varying its electrical resistance like a photoresistor, or generating a electric potential in the manner of a photoelectric cell. See more at photoelectric.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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