water jacket

noun

Definition of water jacket

: an outer casing which holds water or through which water circulates to cool the interior specifically : the enclosed space surrounding the cylinder block of an internal combustion engine and containing the cooling liquid

First Known Use of water jacket

1841, in the meaning defined above

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The first known use of water jacket was in 1841

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Cite this Entry

“Water jacket.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/water%20jacket. Accessed 23 Nov. 2020.

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