What is the meaning of thermionic valve?

Electronic device consisting of a system of electrodes arranged in an evacuated glass or metal envelope.
- synonyms: tube, vacuum tube, thermionic vacuum tube, thermionic tube, electron tube

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APA	WordNet. (2010). thermionic valve. Retrieved September 23, 2026, from http://smartdefine.org/thermionic_valve/definitions/1315888
Chicago	WordNet. 2010. "thermionic valve" http://smartdefine.org/thermionic_valve/definitions/1315888 (accessed September 23, 2026).
Harvard	WordNet 2010, thermionic valve, Smart Define, viewed 23 September, 2026, <http://smartdefine.org/thermionic_valve/definitions/1315888>.
MLA	WordNet. "thermionic valve" 23 October 2010. Web. 23 September 2026. <http://smartdefine.org/thermionic_valve/definitions/1315888>

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