water jacket
- noun
- /ˈwɔːtər ˈdʒækɪt/
- Specialized
- To prevent overheating, the technician checked the water jacket for any leaks.
Examples
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Per Peterson and Joonhong Ahn of the University of California, Berkeley, point out that, without the water jacket, the heat generated by the chain reaction and the dissociation of water into hydrogen and oxygen would have expanded the solution, decreasing its density and slowing its reaction rate.
Academic text (1999) -
As that water gets hot, a thermocouple (in older thermostats; not sure what they use now) forces the valve in the thermostat to open, letting water move between the water jacket and radiator.
Blog text (23) -
As a result, the water in the water jacket around the block stays close to the engine and gets hot faster.
Blog text (23) -
"And because we were able to cast in the water jackets, the die will cool more efficiently to improve cycle times.
Academic text (1995) -
Internal leaks from heat exchangers and water jackets are other potential sources.
Blog text (22) -
The water jacket should be flushed as previously recommended, and the new cylinder-head gasket fitted as previously described.
Blog text (14) -
The T200, a cylinder 16 inches in diameter and 25 inches high, features a water jacket cooling system that makes it resistant to the heat of steel and aluminum manufacturing plants.
Academic text (1994) -
The engine modification has meant diverting some of the engine heat from the exhaust manifold and engine water jacket to the tractor fuel tank and fuel line through copper pipes to maintain the fuel in a liquid condition.
Academic text (2000) -
The engine's water jacket keeps the cylinder block cool by circulating water around it.
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An efficient water jacket design can significantly improve an engine's cooling performance.
Surface Forms
Morphology
The meaning 'a casing filled with water used to cool a machine part' is directly and compositionally derived from 'water' (H₂O) + 'jacket' (an outer casing). This is a standard noun–noun compound pattern found cross-linguistically and a B1 learner who knows both constituents can readily infer the MWE's meaning.
Etymology
Water jacket comes from the image of a jacket of water wrapped around a machine part to take heat away. That's why it means a water-filled casing around an engine part to 'keep it cool'.