# breastbone

> English word · Noun

## Definitions
1. The central narrow bone in the front of the chest, connecting the collarbone and the top ribs.

## Etymology
From Middle English brust-bon, brestbon, from Old English brēostbān (“breastbone”), equivalent to breast + bone.

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