from The American Heritage® Dictionary of the English Language, 4th Edition
- n. An electronic device having an electrical output that varies in response to incident radiation, especially to visible light. Also called electric eye.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A transducer that generates an electric current proportional to the light intensity
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a transducer used to detect and measure light and other radiations
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