phototube

[ foh-tuh-toob, -tyoob ]

noun

, Electronics.

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

phototube

/ ˈfəʊtəʊˌtjuːb /

noun

1. a type of photocell in which radiation falling on a photocathode causes electrons to flow to an anode and thus produce an electric current

Word History and Origins

Origin of phototube¹

First recorded in 1925–30; photo- + tube