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. See air jacket
   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

A separate stove with the fire pot and water jacket is used.

From Project Gutenberg

In the second place, the size of the cylinders and the consequently large extent of water-jacket surface, complicated the problem.

From Project Gutenberg

The loss of heat through the water-jacket is thus less in the case of a high-compression than in that of a low-compression motor.

From Project Gutenberg

The loss through the water jacket of the average automobile power plant is over 50 per cent.

From Project Gutenberg

As the water becomes cooler, it falls to the bottom of the radiator and it is again supplied to the water jacket.

From Project Gutenberg