ornithopter

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or·ni·thop·ter

 (ôr′nə-thŏp′tər)
n.
A machine shaped like an aircraft that is held aloft and propelled by wing movements.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

ornithopter

(ˈɔːnɪˌθɒptə)
n
(Aeronautics) a heavier-than-air craft sustained in and propelled through the air by flapping wings. Also called: orthopter
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

or•ni•thop•ter

(ˌɔr nəˈθɒp tər)

n.
a heavier-than-air craft designed to be propelled through the air by flapping wings.
[< French ornithoptère (1908) =ornitho- ornitho- + -ptère < Greek -pteros -pterous]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.ornithopter - heavier-than-air craft that is propelled by the flapping of wingsornithopter - heavier-than-air craft that is propelled by the flapping of wings
heavier-than-air craft - a non-buoyant aircraft that requires a source of power to hold it aloft and to propel it
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