Definitions for water jacket
Random House Webster's College Dictionary
a water-filled casing or compartment used to water-cool something, as an engine or machine gun.
Origin of water jacket:
a container filled with water that surrounds a machine to cool it; especially that surrounding the cylinder block of an engine
Use the citation below to add this definition to your bibliography:
"water jacket." Definitions.net. STANDS4 LLC, 2013. Web. 24 May 2013. <http://www.definitions.net/definition/water jacket>.