# calcium carbonate

> English word · Noun

## Definitions
1. A colourless or white inorganic compound, CaCO₃, occurring as chalk, limestone, marble etc. Reacts with acids to liberate carbon dioxide.

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