English dictionary



Hint: In most browsers you can lookup any word by double click it.

English noun: thermion

1. thermion (object) an electrically charged particle (electron or ion) emitted by a substance at a high temperature


Broader (hypernym)particle, subatomic particle









Based on WordNet 3.0 copyright © Princeton University.
Web design: Orcapia v/Per Bang. English edition: .
2026 onlineordbog.dk