from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A casing containing water circulated by a pump, used around a part to be cooled, especially in water-cooled internal-combustion engines.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. a container filled with water that surrounds a machine to cool it; especially that surrounding the cylinder block of an engine


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