# petro-

> English word · Prefix

## Definitions
1. stone
2. petroleum
3. oil export, sometimes as a source of funding
4. petrous

## Etymology
* From Latin petra (“stone, rock”), from Ancient Greek πέτρα (pétra, “stone, rock”).
* Clipping of petroleum.

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