thermionics
ther·mio·nics
noun
1.
the branch of electronics dealing with thermionic phenomena (especially thermionic vacuum tubes)
Origin
From thermion + -ics.
Related words
Broader terms
WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.