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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.


(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


(ˌɔr nəˈθɒp tər)

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
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
The town of Kissimmee, Florida, enacted an ordinance in 1908 regulating the town's airspace up to twenty-five miles above the ground, forbidding the flight of any balloons, airplanes, helicopters, ornithopters, or airships from flying within ten feet of streets and alleys, or within twenty feet of any pavement at a speed greater than eight miles per hour.
On the floating city of Iapyx, Simon Daud wants nothing more than to fly ornithopters like his older brother, Isaac.
The Ornithopters, such as a model by inventor James W.
Other topics include curvature analysis of conjugate surfaces via a tensor approach, dynamic analysis of an extendible support structure, determining optimal sizes for a ball-valve micropump channel, development of flapping ornithopters by precision injection molding, and a multi-dimensional model and version control method for small-batch production.