water jacket

¹ American  

noun

1. a water-filled casing or compartment used to water-cool something, as an engine or machine gun.

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water-jacket ² American  

[waw-ter-jak-it, wot-er-] / ˈwɔ tərˌdʒæk ɪt, ˈwɒt ər- /

verb (used with object)

1. to surround or fit with a water jacket.

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water jacket British  

noun

1. a water-filled envelope or container surrounding a machine, engine, or part for cooling purposes, esp the casing around the cylinder block of a pump or internal-combustion engine Compare air jacket

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Etymology

Origin of water jacket¹

First recorded in 1865–70

Origin of water-jacket²

First recorded in 1875–80

Example Sentences

It has a feeder which pushes coal in at one end and ashes out at the other, a water jacket, a small pump which circulates the heated water rapidly to radiators.

From Time Magazine Archive

If the cylinder should be scored, the water jacket and combustion head may be saved and a new cylinder casting purchased at considerably less cost than that of the complete unit cylinder.

From Aviation Engines Design?Construction?Operation and Repair by Pag?, Victor Wilfred

It becomes heated as it passes around the cylinder walls and combustion chambers and the hot water passes out of the top of the water jacket to the upper portion of the radiator.

From Aviation Engines Design?Construction?Operation and Repair by Pag?, Victor Wilfred

Fearing that the uncooled cylinder might suffer damage from the excessive heat, he constructed a copper water jacket in two halves, drew them together around the cylinder with clamping rings and soldered the seams.

From The 1893 Duryea Automobile In the Museum of History and Technology by Berkebile, Donald H.

The absence of a water jacket to the furnace is partly compensated by fitting six water-tubes in the bottom.

From Things To Make by Williams, Archibald