air cushion

air cushion

noun
1.
an inflatable, airtight cushion.
2.
air chamber (def. 2).
3.
an air bag.

Origin:
1830–40

air-cush·ioned, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Air cushion is always a great word to know.
So is doohickey. Does it mean:
a stew of meat, vegetables, potatoes, etc.
a gadget; dingus; thingumbob.
Collins
World English Dictionary
air cushion
 
n
1.  an inflatable cushion, usually made of rubber or plastic
2.  the pocket of air that supports a hovercraft
3.  See also air spring a form of pneumatic suspension consisting of a constricted volume of air

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