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어원 : gyro-= ring; circle; wind
gyroscope n. 회전의 (a gyroscope on a plane)
A gyroscope (from Ancient Greek γῦρος gûros, "circle" and σκοπέω skopéō, "to look") is a device used for measuring or maintaining orientation and angular velocity
gyrocompass n. 회전나침반 (a gyrocompass on a ship)
gyration n. 나선 (the gyration on the surface of a nautilus)
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