# junk ring

> English word · Noun

## Definitions
1. A wide ring which fits in a groove around the piston of an internal combustion engine to keep it steamtight by retaining the packing in place.

## Etymology
From junk + ring, first use appears c. 1839 in the writings of Robert Spencer Robinson.

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