phototransistor Hear it!

phototransistor definition

☆ photo·tran·sis·tor (fōt′ō tran zis′tər, -sis′-)

noun

Electronics a device combining the function of a photodiode with the amplifying function of a transistor

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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