# pyroclastic

> English word · Adjective · frequency rank #64,641

## Definitions
1. Mostly composed of rock fragments of volcanic origin or comminuted during an eruption.

## Etymology
From pyro- + clastic, from Ancient Greek πῦρ (pûr, “fire”), and κλαστός (klastós, “broken”).

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