airfoil

noun

cross-sectional shape of a wing, blade (of a propeller, rotor, or turbine), or sail

Wiktionary

noun

Etymology: Etymology tree Proto-Indo-European *h₂ews- Proto-Indo-European *h₂ewsér Proto-Hellenic *auhḗr Ancient Greek ᾱ̓ήρ (āḗr)bor. Latin āēr Old French airbor. Middle English aire English air English foil English airfoil From air + foil.

A structure shaped to produce lift when moving in air.
A wing of an aircraft.