What is the meaning of Aileron?

The hinged part on the trailing edge of an airplane wing, used to control longitudinal turns.

A half gable, as at the end of a penthouse or of the aisle of a church.

aileron (aeroplane part)

fin (of some fish)

flipper (of penguins and other animals)

aileron

spoiler (of an automobile)

aileron

Alternative form of ailerão

Source: wiktionary.org