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Gyration

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Gyration

1. The act of turning or whirling, as around a fixed center; a circular or spiral motion; motion about an axis; rotation; revolution. The gyrations of an ascending balloon. (De Quincey) If a burning coal be nimbly moved round in a circle, with gyrations continually repeated, the whole circle will appear like fire. (Sir i. Newton)

2. (Science: zoology) One of the whorls of a spiral univalve shell. Center of gyration.

3. (Science: physics) radius of gyration the distance between the axis of a rotating body and its center of gyration.