Usually means: Semiconductor device sensitive to light.
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We found 12 dictionaries that define the word phototransistor:

General (11 matching dictionaries)
  1. phototransistor: Merriam-Webster
  2. phototransistor: Oxford Learner's Dictionaries
  3. phototransistor: American Heritage Dictionary of the English Language
  4. phototransistor: Collins English Dictionary
  5. phototransistor: Wordnik
  6. phototransistor: Wiktionary
  7. phototransistor: Webster's New World College Dictionary, 4th Ed.
  8. phototransistor: Infoplease Dictionary
  9. phototransistor: Dictionary.com
  10. Phototransistor: Wikipedia, the Free Encyclopedia
  11. phototransistor: TheFreeDictionary.com

Computing (1 matching dictionary)
  1. phototransistor: Encyclopedia

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Definitions from Wiktionary (phototransistor)

▸ noun:  (electronics) Any semiconductor device whose electrical characteristics are light-sensitive.

Similar:
photopentode, phototriode, photoresistor, phototube, photodevice, photodetector, photoelement, photoelectric cell, photoceptor, photocell, more...

Opposite:
photodiode, photovoltaic cell, photoresistor

Types:
silicon, germanium, gallium arsenide, indium arsenide, indium tin oxide, more...

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Similar:
photopentode, phototriode, photoresistor, phototube, photodevice, photodetector, photoelement, photoelectric cell, photoceptor, photocell, more...

Opposite:
photodiode, photovoltaic cell, photoresistor

Types:
silicon, germanium, gallium arsenide, indium arsenide, indium tin oxide, more...



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