thermionic valve
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thermionic valve
noun thermionic valves
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An electronic device incorporating electrons from a glowing cathode inside an evacuated glass tube, functioning as a switch, amplifier etc.
The age of electronics began in 1906 with Lee De Forest's invention of the vacuum tube, or, as the British (led by John Ambrose Fleming, whose work preceded De Forest's) described it, the thermionic valve.
Similar: vacuum tube
Talk about this word "thermionic valve." Wiktionary, via Micwyn, micwyn.com/word/thermionic%20valve. Accessed 6 Nov. 2026. thermionic valve. (n.d.). In Wiktionary, via Micwyn. Retrieved November 6, 2026, from https://micwyn.com/word/thermionic%20valve "thermionic valve." Wiktionary, via Micwyn. Accessed November 6, 2026. https://micwyn.com/word/thermionic%20valve.Cite this
@misc{thermionic_valve_2026,
title = {thermionic valve},
howpublished = {Wiktionary, via Micwyn},
year = {2026},
url = {https://micwyn.com/word/thermionic%20valve},
urldate = {2026-11-06}
}
