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rotary wing

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rotary wing

–noun Aeronautics.
an airfoil that rotates about an approximately vertical axis, as that supporting a helicopter or autogiro in flight.

Origin:
1930–35
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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rotary wing

noun
the long airfoil that rotates to provide the lift that supports a helicopter in the air [syn: rotor blade
WordNet® 3.0, © 2006 by Princeton University.
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