noun
: an air-driven free gyroscope with rotor spinning on a horizontal axis that when manually set to some one direction maintains that fixed direction despite maneuvers of its conveyor and thereby indicates any deviation from the course
noun
: an air-driven free gyroscope with rotor spinning on a horizontal axis that when manually set to some one direction maintains that fixed direction despite maneuvers of its conveyor and thereby indicates any deviation from the course
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012