trunnion

[ truhn-yuhn ]

noun

1. either of the two cylindrical projections on a cannon, one on each side for supporting the cannon on its carriage.
2. any of various similar supports for machinery.

trunnion

/ ˈtrʌnjən /

noun

1. one of a pair of coaxial projections attached to opposite sides of a container, cannon, etc, to provide a support about which it can turn in a vertical
2. the structure supporting such a projection

Derived Forms

• ˈtrunnioned, adjective

Other Words From

• trunnioned adjective

Word History and Origins

Origin of trunnion¹

First recorded in 1615–25, trunnion is from the French word trognon trunk, stump, core (of fruit)

Word History and Origins

Origin of trunnion¹

C17: from Old French trognon trunk

Example Sentences

A failed weld on a valve casing called a trunnion caused the gas leak that forced the plant to close on July 1, he said.

From Reuters

Next year, it plans to shore up the eight trunnion posts that, like table legs, support the vast weight of the drawbridge section.

From Washington Post

We've just had the trunnion fitting delivered, so we're ready for that first fit as soon as the upper chassis is finished.

From BBC

It's astonishing to think that the engines are held in place, even at the maximum 9g of the display, by a single thrust trunnion - essentially by one large bolt.

From BBC

Trunnion and Pipes became living men under his pencil, and "Clarissa" and others of Richardson's romances gained from him an immortality which they would never have acquired by their own merits.

From Project Gutenberg