gyroscope[jī′rō skōp′, -rə-]
Origin of gyroscopegyro- + -scope
- an apparatus composed of a wheel which spins inside of a frame (gimbal) and causes the balancing of the frame in any direction or position. In the form of a gyroscopic stabilizer, used to help keep aircraft and ships steady.
gyro- + -scope, from French coined in 1856 by physicist Leon Foucault, from Ancient Greek γῦρος (guros, “circle”) and σκοπός (skopos, “watcher”).