# siltstone

> English word · Noun · frequency rank #77,200

## Definitions
1. A sedimentary rock whose composition is intermediate in grain size between the coarser sandstone and the finer mudstone.

## Etymology
From silt + stone.

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