# exthorio

> English word · Noun

## Definitions
1. Synonym of thoron (“radon-220”).

## Etymology
From Latin ex (“out of”) + thōriō (“thorium”).

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