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or autogyro

[aw-tuh-jahy-roh] /ˌɔ təˈdʒaɪ roʊ/
noun, plural autogiros.
an aircraft with an unpowered, horizontally rotating propeller on a shaft above the fuselage that provides lift for the machine, with forward propulsion being provided by a conventional propeller: superseded in most applications by the helicopter.
Also called gyrocopter, gyroplane.
Origin of autogiro
First recorded in 1920-25; formerly a trademark Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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noun (pl) -ros
a self-propelled aircraft supported in flight mainly by unpowered rotating horizontal blades Also called gyroplane Compare helicopter
Word Origin
C20: originally a trademark
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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