Ornithopter
[awr-nuh-thop-ter] /ˌɔr nəˈθɒp tər/
noun
1.
a heavier-than-air craft designed to be propelled through the air by flapping wings.
/ˈɔːnɪˌθɒptə/
noun
1.
a heavier-than-air craft sustained in and propelled through the air by flapping wings Also called orthopter
n.
1908, from French ornithoptère (1908), a machine designed to fly be mechanical flapping of wings, from ornitho- + Greek pteron “wing” (see pterodactyl). A mode of flight considered promising at least since Leonardo’s day.
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Oak Ridge National Laboratory