What is the meaning of thermionic tube?

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

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APA	WordNet. (2010). thermionic tube. Retrieved September 20, 2026, from http://smartdefine.org/thermionic_tube/definitions/1315886
Chicago	WordNet. 2010. "thermionic tube" http://smartdefine.org/thermionic_tube/definitions/1315886 (accessed September 20, 2026).
Harvard	WordNet 2010, thermionic tube, Smart Define, viewed 20 September, 2026, <http://smartdefine.org/thermionic_tube/definitions/1315886>.
MLA	WordNet. "thermionic tube" 23 October 2010. Web. 20 September 2026. <http://smartdefine.org/thermionic_tube/definitions/1315886>

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