We found 17 dictionaries that define the word thermion:

General (13 matching dictionaries)

1. thermion: Merriam-Webster
2. thermion: Oxford Learner's Dictionaries
3. thermion: American Heritage Dictionary of the English Language
4. thermion: Collins English Dictionary
5. thermion: Vocabulary.com
6. thermion: Wiktionary
7. thermion: Webster's New World College Dictionary, 4th Ed.
8. thermion: Infoplease Dictionary
9. thermion: Dictionary.com
10. thermion: Rhymezone
11. thermion: FreeDictionary.org
12. thermion: Mnemonic Dictionary
13. thermion: TheFreeDictionary.com

Computing (1 matching dictionary)

14. thermion: Encyclopedia

Medicine (1 matching dictionary)

15. thermion: Medical dictionary

Science (1 matching dictionary)

16. Thermion: Extragalactic Astronomy

Tech (1 matching dictionary)

17. Rane Professional Audio Reference (No longer online)

(Note: See thermions as well.)

Definitions from Wiktionary (thermion) ▸ noun:  (physics) An electrically charged particle, either an electron or an ion, emitted by a conducting material at high temperatures Similar: thermionics, thermoelectron, thermalon, thermosonimetry, thermoelectronics, thermogen, thermoelement, thermoelectrometry, thermovoltage, thermoelectricity, more... ▸ Words similar to thermion ▸ Usage examples for thermion ▸ Idioms related to thermion ▸ Wikipedia articles (New!) ▸ Popular adjectives describing thermion ▸ Words that often appear near thermion ▸ Rhymes of thermion ▸ Invented words related to thermion