noun
- Electronic device consisting of a system of electrodes arranged in an evacuated glass or metal envelope.
- synonyms: tube, vacuum tube, thermionic tube, electron tube, thermionic valve
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| APA | WordNet. (2010). thermionic vacuum tube. Retrieved September 30, 2026, from http://smartdefine.org/thermionic_vacuum_tube/definitions/1315887 |
| Chicago | WordNet. 2010. "thermionic vacuum tube" http://smartdefine.org/thermionic_vacuum_tube/definitions/1315887 (accessed September 30, 2026). |
| Harvard | WordNet 2010, thermionic vacuum tube, Smart Define, viewed 30 September, 2026, <http://smartdefine.org/thermionic_vacuum_tube/definitions/1315887>. |
| MLA | WordNet. "thermionic vacuum tube" 23 October 2010. Web. 30 September 2026. <http://smartdefine.org/thermionic_vacuum_tube/definitions/1315887> |