trunnion

noun
trun·​nion | \ ˈtrən-yən How to pronounce trunnion (audio) \

Definition of trunnion

: a pin or pivot on which something can be rotated or tilted especially : either of two opposite gudgeons on which a cannon is swiveled

Examples of trunnion in a Sentence

Recent Examples on the Web Crews have been replacing trunnion parts of the 103 year old structure that help lift and lower the bridge. oregonlive, "Portland traffic: Northbound Interstate Bridge reopens late Sunday; what’s next?," 25 Sep. 2020 The lane closure is scheduled from Sept. 28 - Oct. 4 as construction crews reconnect the median barrier and wrap up from the trunnion project. oregonlive, "Portland traffic: Northbound Interstate Bridge reopens late Sunday; what’s next?," 25 Sep. 2020 When the Interstate Bridge replacement project known as the Columbia River Crossing collapsed, plans accelerated to replace the aging trunnion. oregonlive, "Lengthy Interstate Bridge lane closure looms, officials expect ‘significant delays’," 27 Aug. 2020 State officials first spotted a crack in a trunnion on the northbound span, which functions like an axle and allows for the bridge to move up and down, more than two decades ago. oregonlive, "Lengthy Interstate Bridge lane closure looms, officials expect ‘significant delays’," 27 Aug. 2020 The $13 million project will replace the trunnion on the north span. oregonlive, "Bi-state committee tasked with reviving Interstate Bridge project meets next Friday," 18 Oct. 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'trunnion.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of trunnion

circa 1625, in the meaning defined above

History and Etymology for trunnion

French trognon core, stump

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Time Traveler for trunnion

Time Traveler

The first known use of trunnion was circa 1625

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Cite this Entry

“Trunnion.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/trunnion. Accessed 19 Jan. 2021.

More from Merriam-Webster on trunnion

Britannica.com: Encyclopedia article about trunnion

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