winglet
noun
- wingtip device
- small or rudimentary wing
Wiktionary
Pronunciation: /ˈwɪŋlət/
noun
Etymology: From wing + -let.
- A little wing.
- A winglike structure at a wingtip set at an angle to the plane of the wing designed to reduce drag by its effect on wingtip vortices.
- The bastard wing or alula of a bird.
- The pterygium of a weevil.