Dictionary.com

phototube

[ foh-tuh-toob, -tyoob ]
/ ˈfoʊ təˌtub, -ˌtyub /
Save This Word!
noun Electronics.
an electron tube with a photosensitive cathode, used like a photocell.
QUIZ
GOOSES. GEESES. I WANT THIS QUIZ ON PLURAL NOUNS!
Test how much you really know about regular and irregular plural nouns with this quiz.
Question 1 of 9
Which of the following nouns has an irregular plural form?
cactus
wallet
goat
party
TAKE THE QUIZ TO FIND OUT
Also called photoelectric tube.

Origin of phototube

First recorded in 1925–30; photo- + tube

Words nearby phototube

phototroph, phototrophic bacteria, phototropic, phototropism, phototropy, phototube, phototype, phototypeset, phototypesetting, phototypography, photovoltaic
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022

British Dictionary definitions for phototube

phototube
/ (ˈfəʊtəʊˌtjuːb) /
noun
a type of photocell in which radiation falling on a photocathode causes electrons to flow to an anode and thus produce an electric current
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
FEEDBACK