ailerons is a form of:

Aileron



noun
1.
(a moveable part on the rear edge of each wing of, an airplane to steady it in flight) ផ្នែកនៃស្លាបយន្ដហោះដែលប៉ាក់ប៉ើកសម្រាប់ធ្វើឲ្យយន្ដហោះឡើងឬចុះ
ENGLISH MEANING
noun
1.
A half gable, as at the end of a penthouse or of the aisle of a church.
2.
A small plane or surface capable of being manipulated by the pilot of a flying machine to preserve or destroy lateral balance; a hinged wing tip; a lateral stabilizing or balancing plane.