phototube

[ foh-tuh-toob, -tyoob ]
/ ˈfoʊ təˌtub, -ˌtyub /

noun Electronics.

an electron tube with a photosensitive cathode, used like a photocell.
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

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