# trunnion

> English word · Noun · IPA /ˈtɹʌn.jən/

## Definitions
1. One of the short stubby bearings on either side of a cannon; a pintle.
2. A similar rotational bearing comprising a rotating arc or ring sliding in the groove of a stationary arc, used in machinery to allow a workpiece to be moved relative to a fixed tool.
3. A shaft, held by a bearing, at each end or side of a rotatable object.
4. A similar rotational bearing used in automotive suspensions.

## Etymology
From French trognon (“core, stump”).

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