# periosteum

> English word · Noun

## Definitions
1. A membrane surrounding a bone.

## Etymology
From Ancient Greek περί (perí, “about, around”) + ὀστέον (ostéon, “bone”).

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