# thermion

> English word · Noun

## Definitions
1. An electrically charged particle, either an electron or an ion, emitted by a conducting material at high temperatures

## Etymology
From therm- + ion.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/thermion