Dictionary

phototube

phototube

noun pho·to·tube \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

Browse

Next Word in the Dictionary: phototypesettingPrevious Word in the Dictionary: phototropyAll Words Near: phototube
March 04, 2015
sprightly Hear it
Full of life and energy
Take a 3-minute break and test your skills!
How to use a word that (literally) drives some people nuts.
Test your vocab with our fun, fast game
Ailurophobia, and 9 other unusual fears