ornithopter (n.)youdaoicibaDictYouDict[ornithopter 词源字典]
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.[ornithopter etymology, ornithopter origin, 英语词源]