# Rochelle salt

> English word · Noun

## Definitions
1. The double salt potassium sodium tartrate tetrahydrate (KNaC₄H₄O₆·4H₂O), used for various scientific and medical purposes.

## Etymology
From La Rochelle in France.

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