elevon

/ˈɛləvɑn/
noun
  1. A control surface on an aircraft that combines the functions of an elevator (pitch control) and an aileron (roll control).
    • The pilot adjusted the elevon to change the plane's pitch and roll simultaneously.
    • Modern fighter jets use elevons for more agile flight control.
    • The technician inspected the elevon for any signs of wear before the test flight.