Stabilizer (aeronautics)
TAIL FIN(S), USUALLY PLACED ON THE AIRCRAFT TAIL, WHERE RUDDER AND ELEVATOR IS MOUNTED
Adjustable stabilizer; Stabiliser (aircraft); Stabilizer (aircraft); Fin (aeronautics)
An aircraft stabilizer is an aerodynamic surface, typically including one or more movable control surfaces,Empennage - D. Stinton The design of the aeroplane, Longitudinal stability - Hoerner Fluid Dynamic Lift - Ilan Kroo, Aircraft Design.