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.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
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| Noun | 1. |  ornithopter - heavier-than-air craft that is propelled by the flapping of wingsheavier-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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