Air jacket
an envelope of enclosed air around part of a machine, as for checking the transmission of heat.
british, .
noun
an air-filled envelope or compartment surrounding a machine or part to reduce the rate at which heat is transferred to or from it compare water jacket
a less common name for life jacket
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a lance using an air blast. to clean with an air lance.
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a route regularly used by airplanes; airway.
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a winged, jet-powered missile designed to be launched from an aircraft and to fly toward the target at low alt-tude on automatic guidance, with a range of almost 2500 miles (4023 km). abbreviation: alcm, a.l.c.m.
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to treat a plant by means of air layering. to use air layering to propagate a plant. a plant, commonly a young one, that has been propagated by air layering.