Search Result for "ornithopter": 
Wordnet 3.0

NOUN (1)

1. heavier-than-air craft that is propelled by the flapping of wings;
[syn: orthopter, ornithopter]



WordNet (r) 3.0 (2006):

ornithopter
    n 1: heavier-than-air craft that is propelled by the flapping of
         wings [syn: orthopter, ornithopter]