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ornithopter

or·ni·thop·ter [ àwrnə thóptər ] (plural or·ni·thop·ters)


noun 
Definition:
 
aircraft with flapping wings: an early flying machine that operated using flapping wings. Although many prototypes have been flown in the past 100 years, no ornithopter has ever been commercially successful.

[Early 20th century. < French ornithoptère< Greek ornith- "bird" + pteron "wing"]
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