# headbox

> English word · Noun

## Definitions
1. Synonym of headrail.
2. A device for distributing a suspension of solids in water to a machine at a constant rate, or for retarding the rate of flow, as to a top-feed filter, or for eliminating by overflow some of the finest particles.
3. The topmost square of a USPSA target holding the B and A scoring zones.

## Etymology
From head + box.

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