control surface
noun
any movable airfoil, as a rudder, flap, or aileron, for guiding or controlling an aircraft or missile in flight.
Origin of control surface
First recorded in 1915–20
Words nearby control surface
control point,
control rocket,
control rod,
control room,
control stick,
control surface,
control survey,
control syringe,
control tower,
control unit,
control variable
British Dictionary definitions for control surface
control surface
noun
a movable surface, such as a rudder, elevator, aileron, etc, that controls an aircraft or rocket