empennage
Concise Oxford English Dictionary © 2008 Oxford University Press:
empennage /ɛmˈpɛnɪdʒ/
▶noun Aeronautics an arrangement of stabilizing surfaces at the tail of an aircraft.
– origin early 20th cent.: from Fr., from empenner ‘to feather an arrow’, from em- ‘in’ + penne ‘a feather’.
'empennage' also found in these Oxford entries:

