pho·to·e·lec·tric

[foh-toh-i-lek-trik]
adjective
pertaining to the electronic or other electric effects produced by light.
Also, pho·to·e·lec·tri·cal.


Origin:
1860–65; photo- + electric

pho·to·e·lec·tri·cal·ly, adverb
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
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Collins
World English Dictionary
photoelectric or photoelectrical (ˌfəʊtəʊɪˈlɛktrɪk) [Click for IPA pronunciation guide]
 
adj
of or concerned with electric or electronic effects caused by light or other electromagnetic radiation
 
photoelectrical or photoelectrical
 
adj
 
photoe'lectrically or photoelectrical
 
adv
 
photoelectricity or photoelectrical
 
n

Collins English Dictionary - Complete & Unabridged 10th Edition
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00:10
Photoelectric is always a great word to know.
So is lollapalooza. Does it mean:
an extraordinary or unusual thing, person, or event; an exceptional example or instance.
an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.
American Heritage
Medical Dictionary

photoelectric pho·to·e·lec·tric (fō'tō-ĭ-lěk'trĭk) or pho·to·e·lec·tri·cal (-trĭ-kəl)
adj.
Of or relating to the electric effects, especially increased conductivity, caused by light.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
photoelectric   (fō'tō-ĭ-lěk'trĭk)  Pronunciation Key 
Relating to or exhibiting to electrical effects upon exposure to light. For example, some photoelectric materials emit electrons called photoelectrons upon exposure to certain frequencies of light; others, such as photoresistors and phototransistors, change their electrical properties. See also photoelectric effect.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
There are two types of smoke alarms in general use for residential smoke
  alarms: photoelectric and ionization.
The photoelectric controls shall also be equipped with a built-in
  expulsion-type surge and lighting protection arrester.
Photoelectric smoke detectors, use a light and sensor to detect smoke.
In the photoelectric effect, electrons in the metal absorb light quanta.
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