air-sock

air sock

noun
Dictionary.com Unabridged

windsock

[wind-sok]
noun
a tapered, tubular cloth vane, open at both ends and having at the larger end a fixed ring pivoted to swing freely, installed at airports or elsewhere to indicate wind direction and approximate intensity.
Also, wind sock.
Also called air sleeve, air sock, wind cone, wind sleeve.


Origin:
1925–30; wind1 + sock1

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Collins
World English Dictionary
air sock
 
n
another name for windsock

windsock (ˈwɪndˌsɒk)
 
n
air sock, drogue, wind sleeve, Also called: wind cone a truncated cone of textile mounted on a mast so that it is free to rotate about a vertical axis: used, esp at airports, to indicate the local wind direction

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