A water jacket is a water-filled void surrounding a device, typically a metal sheath having intake and outlet vents to allow water to be pumped through the void. The flow of water to an external heating or cooling device allows precise temperature control of the device.
Example Usage of jacket
jacknealy: This is sad. I have been standing in my living room, my bag still on my shoulder, shoes & jacket on, staring at the TV.
YOUNGDOT5: #IGrewUpOn welfare ....w. a pair ov avirex and g-unit boots ...rocawear jacket and i dead thought i was flea !
STEVEASAUR_: oh hey got my leather jacket and singlet now i need black skinnys
