Origin of aileronFrench from Old French aleron, wingtip from aile, wing from Classical Latin ala, wing, armpit from an unverified form agsla from Indo-European an unverified form aks-: see axis
Origin of aileronFrench diminutive of aile wing from Old French from Latin āla
To bank to the left, a pilot must raise the left aileron and lower the right aileron.
Borrowing from French aileron, diminutive of aile (“wing”), also refers to the extremities of a bird's wings used to control their flight. It first appeared in print in the 7th edition of Cassell's French-English Dictionary of 1877, with its lead meaning of "small wing". In the context of powered airplanes it appears in print about 1908, in the French aviation journal L'Aérophile.