Autogyro

An autogyro (from Greek αυτό + γύρος, self-turning), also known as gyroplane, gyrocopter, or rotaplane, is a type of rotorcraft which uses an unpowered rotor in autorotation to develop lift, and an engine-powered propeller, similar to that of a fixed-wing aircraft, to provide thrust. While similar to a helicopter rotor in appearance, the ...
Found on http://en.wikipedia.org/wiki/Autogyro

autogyro

A rotary-wing aircraft that uses a propeller for forward motion and a freely rotating, unmotorized rotor for lift. The Spanish aeronautical engineer Juan de la Cierva invented it in the early 1920s. The rotor looks like a propeller with three or four very long blades. This rotor mounted is mounted...
Found on http://www.daviddarling.info/encyclopedia/A/autogyro.html

autogyro

A rotor-craft with unpowered blades that develop lift, and an engine-powered propeller to provide thrust.
Found on http://www.translationdirectory.com/glossaries/glossary370.php

Autogyro

A trade name copyrighted by the Cierva Autogiro Company Limited for the gyroplanes made by that Company.
Found on http://www.aeroplanemonthly.com/glossary/

Autogyro

An aeroplane that flies by virtue of the lift generated by freewheeling rotating wings set windmill fashion above the fuselage. The forward motion of the autogiro provides the force to keep the rotors turning so unlike a helicopter the autogiro cannot hover. See also: Aircraft, Helicopter.
Found on http://www.diracdelta.co.uk/science/source/a/u/autogyro/source.html

Autogyro

An aircraft, often wingless, with unpowered rotary airfoil blades that auto-rotate and serve as wing
Found on http://www.superglossary.com/Glossary/Technology/Aviation/

autogyro

autogyro, autogiro 1. An aircraft powered by a conventional propeller and supported in flight by a freewheeling, horizontal rotor that provides lift. 2. 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:...
Found on http://www.wordinfo.info/words/index/info/view_unit/946/
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