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air jacket

 - 2 dictionary results

air jacket

–noun
1. an envelope of enclosed air around part of a machine, as for checking the transmission of heat.
2. British. life jacket.

Origin:
1905–10

life jacket

–noun
a sleeveless jacket of buoyant or inflatable construction, for supporting the wearer in deep water and preventing drowning.
Also called life vest; British, air jacket.


Origin:
1865–70
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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