autogiro

from WordNet (r) 3.0 (2006)

autogiro
    n 1: an aircraft that is supported in flight by unpowered
         rotating horizontal wings (or blades); forward propulsion
         is provided by a conventional propeller [syn: {autogiro},
         {autogyro}, {gyroplane}]

from The Collaborative International Dictionary of English v.0.48

autogiro \autogiro\ n.
   same as {autogyro}.

   Syn: autogyro, gryoplane
        [WordNet 1.5]