8 letters · 12 points in Scrabble
noun an aircraft that is supported in flight by unpowered rotating horizontal wings (or blades); forward propulsion is provided by a conventional propeller
originFrom auto- and gyro-, from latinized forms of Ancient Greek αὐτο- (auto-, “self-”) and γῦρος (gûros, “circle, gyre”), a variant of earlier Spanish autogiro.
Etymology from Wiktionary, CC BY-SA 3.0