Dictionary
au•to•gi•ro
Pronunciation: (ô"tu-jī'rō), [key]—
n.,
—pl. -ros.
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the fuselage that provides lift for the machine, with forward propulsion being provided by a conventional propeller: superseded in most applications by the helicopter.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,au"to•gy'ro.Also called
gyrocopter, gyroplane. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.