an envelope of enclosed air around part of a machine, as for checking the transmission of heat.
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
- Air kiss
a pursing of the lips in a pretended kiss, as when parting on the telephone or touching cheeks in greeting. noun a kissing gesture, esp one directed towards a person’s cheeck, made without making physical contact verb to make such a gesture towards a person
- Air lance
a lance using an air blast. to clean with an air lance.
- Air lane
a route regularly used by airplanes; airway.
- Air-launched cruise missile
a winged, jet-powered missile designed to be launched from an aircraft and to fly toward the target at low altitude on automatic guidance, with a range of almost 2500 miles (4023 km). Abbreviation: ALCM, A.L.C.M.