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airfoil
4 dictionary results for: airfoil
Dictionary.com Unabridged (v 1.1) - Cite This Source - Share This
air·foil       [air-foil] Pronunciation Key
–noun Aeronautics.
any surface, as a wing, aileron, or stabilizer, designed to aid in lifting or controlling an aircraft by making use of the air currents through which it moves.

[Origin: 1920–25; air1 + foil2]
American Heritage Dictionary - Cite This Source - Share This
air·foil       (âr'foil')  Pronunciation Key 
n.   A part or surface, such as a wing, propeller blade, or rudder, whose shape and orientation control stability, direction, lift, thrust, or propulsion.

WordNet - Cite This Source - Share This
airfoil

noun
a device that provides reactive force when in motion relative to the surrounding air; can lift or control a plane in flight 

The American Heritage Science Dictionary - Cite This Source - Share This
airfoil       (âr'foil')  Pronunciation Key 
A structure having a shape that provides lift, propulsion, stability, or directional control in a flying object. An aircraft wing provides lift by causing air to pass at a higher speed over the wing than below it, resulting in greater pressure below than above. Propellers are airfoils that are spun rapidly to provide propulsion. See more at Bernoulli effect, See Note at aerodynamics.

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