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air pocket

   Also found in: Dictionary/thesaurus, Wikipedia 0.06 sec.
air pocket
a localized region of low air density or a descending air current, causing an aircraft to suffer an abrupt decrease in height

air pocket [′er ‚päk·ət]
(engineering)
An air-filled space that is normally occupied by a liquid. Also known as air trap.
(meteorology)
An expression used in the early days of aviation for a downdraft; such downdrafts were thought to be pockets in which there was insufficient air to support the plane.


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This rule applies to any wine anywhere, any time: Wines need to be stored lying down to prevent an air pocket in the bottle causing an early loss of quality.
You'll hit the second air pocket when your opponents start talking about money.
It's a crack that gives vent to a subterranean air pocket, and when conditions are right, you can hear the throaty rumble or feel its emitted gust.
 
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