# vent-piece

> English word · Noun

## Definitions
1. In a breechloading firearm, a vertical sliding block with a conical plug on its front surface to seal the firing chamber and close the breech.

## Etymology
From vent + piece.

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