Word.ws English Dictionary

thermionic valves

thermionic valves is the plural of thermionic valve.

Meaning of thermionic valve

Noun

thermionic valve (plural thermionic valves)

  1. (historical) 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.2012, George Dyson, Turing's Cathedral, Penguin, published 2013, page 65
    Synonyms:
    vacuum tube

Questions about thermionic valves

What is thermionic valves the plural of?
Thermionic valves is the plural of thermionic valve.

Words near thermionic valves in the dictionary

  1. thermion
  2. thermionic
  3. thermionic tube
  4. thermionic tubes
  5. thermionic valve
  6. thermionic valves
  7. thermionically
  8. thermionics
  9. thermions
  10. thermisation
  11. thermise

Source and license

Adapted from Wiktionary: thermionic valves (page history and authors); thermionic valve (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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Cite this entry: “thermionic valves.” Word.ws, https://word.ws/thermionic_valves. Based on Wiktionary, CC BY-SA 4.0.