Gy*ra"tion (?), n.
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.
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.
One of the whorls of a spiral univalve shell.
Center of gyration. Mech. See under Center. -- Radius of gyration the distance between the axis of a rotating body and its center of gyration. Rankine.
© Webster 1913.