empennage |ɛmˈpɛnɪdʒ|
noun Aeronautics (from the OED). An arrangement of stabilizing surfaces at the tail of an aircraft.
ORIGIN: early 20th century: from French, from empenner ‘to feather an arrow’, from em- ‘in’ + penne ‘a feather’ (from Latin penna).empennage |ɛmˈpɛnɪdʒ|
Stratospheric mountain waves (link)
