noun
- The branch of electronics dealing with thermionic phenomena (especially thermionic vacuum tubes. ).
WordNet 3.0 © 2006 by Princeton University
| APA | WordNet. (2010). thermionics. Retrieved September 20, 2026, from http://smartdefine.org/thermionics/definitions/1323544 |
| Chicago | WordNet. 2010. "thermionics" http://smartdefine.org/thermionics/definitions/1323544 (accessed September 20, 2026). |
| Harvard | WordNet 2010, thermionics, Smart Define, viewed 20 September, 2026, <http://smartdefine.org/thermionics/definitions/1323544>. |
| MLA | WordNet. "thermionics" 23 October 2010. Web. 20 September 2026. <http://smartdefine.org/thermionics/definitions/1323544> |