# thornstone

> English word · Noun

## Definitions
1. A deposit of calcium compounds in the process of graduating brine.

## Etymology
Calque of German Dornstein, equivalent to thorn + stone.

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