411 REFERENCE · Wiktionary
Coolidge tube
Reference material by Wiktionary contributors. This retains its source identity and is not 411 news reporting.
English
Etymology
Introduced by William Coolidge in 1913.
Noun
An improvement on the Crookes tube in which the electrons are produced by thermionic effect from a tungsten filament heated by an electric current.
Synonyms
en hot cathode tube
en eponyms