em·pen·nage (ěm'pə-nĭj) n. The tail assembly of an aircraft, including the horizontal and vertical stabilizers, elevators, and rudder.
[French, feathers on an arrow, empennage, from empenner, to feather an arrow : en-, in; see en-1 + penne, feather (from Latin penna; see pet- in Indo-European roots).]