| Gy | rotating mechanism in the form of a universally mounted spinning wheel that offers resistance to turns in any direction |
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| Gy | having the characteristics of a gyroscope |
| Gy | a stabilizer consisting of a heavy gyroscope that spins on a vertical axis |
| Gy | a stabilizer consisting of a heavy gyroscope that spins on a vertical axis |
| Gy | a convex fold or elevation in the surface of the brain |
| Gy | a long curved structure on the medial surface of the cerebral hemispheres |
| Gy | English comedienne and mistress of Charles II (1650-1687) |