phototube
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About Our Definitions: All forms of a word (noun, verb, etc.) are now displayed on one page.pho·to·tube
noun \ˈfō-tō-ˌtüb, -ˌtyüb\Definition of PHOTOTUBE
: an electron tube having a photoemissive cathode whose released electrons are drawn to the anode by reason of its positive potential
First Known Use of PHOTOTUBE
1930
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