aerofoil aerofoil /ˈɛroʊfɔɪl/

noun

1. [British] A device that provides reactive force when in motion relative to the surrounding air; can lift or control a plane in flight  ( aerofoil [British] , airfoil [ N. American] , control surface , surface )
   a device that provides reactive force when in motion relative to the surrounding air; can lift or control a plane in flight