# jockey valve

> English word · Noun

## Definitions
1. A manually-controlled auxiliary valve on the regulator of a steam engine to control smaller amounts of steam than can be managed by the main valve.

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