water jacket

¹

noun

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

water-jacket

²

[ waw-ter-jak-it, wot-er- ]

verb (used with object)

1. to surround or fit with a water jacket.

water jacket

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

Word History and Origins

Origin of water jacket¹

First recorded in 1865–70

Origin of water jacket²

First recorded in 1875–80

Example Sentences

The individual cylinder design was of extreme simplicity, a single iron casting embodying everything except the water jacket.

From Project Gutenberg

The water is pumped through brass pipes to the lower end of the cylinder water jackets and leaves the upper end of the jackets just above the exhaust valves.

From Project Gutenberg

The gas is measured in the graduated cylinder on the right, which is surrounded by a water jacket and provided with a levelling bottle.

From Project Gutenberg

The Kodiopticon has a water jacket for protection of the slides from heat, and the price includes a strong wooden case, which, by reversing the top, serves as a permanent stand for the outfit.

From Project Gutenberg

The outside of the vacuum jacket was immersed in a water jacket at a steady temperature equal to that of the inflowing mercury.

From Project Gutenberg