phototube Hear it!

phototube definition

photo·tube (fōt′ō to̵̅o̅b′, -tyo̵̅o̅b′)

noun

a vacuum tube designed to convert light energy into electrical energy by means of a photoemissive cathode

Etymology: photo(electric) + tube

Webster's New World College Dictionary Copyright © 2005 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

Comments
Improve this definition.
Do you have more to add? Share your linguistic knowledge or observation.
/Register to save your comments.