Empennage
The section of the airplane that consists of the vertical stabilizer, the horizontal stabilizer, and the associated control surfaces.
Aviation Maintenance Technician Handbook — General, p. G-4; Pilot's Handbook of Aeronautical Knowledge, p. G-11
Also defined in 1 more source
The tail section of an airplane.
Aviation Maintenance Technician Handbook — Airframe, p. G-14