noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   An electrically charged particle, either an electron or an ion, emitted by a conducting material at high temperatures
2. 2
   an electrically charged particle (electron or ion) emitted by a substance at a high temperature wordnet

Synonyms

All synonyms

beta particleelectronoctet

Etymology

From therm- + ion.

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.