GYRATION
Gy*ra"tion, n.
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. (Zoöl.)
Defn: 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.
GYRATORY
Gy"ra*to*ry, a.
Defn: Moving in a circle, or spirally; revolving; whirling around.
GYRE
Gyre, n. Etym: [L. gyrus, Gr.
Defn: A circular motion, or a circle described by a moving body; a
turn or revolution; a circuit.
Quick and more quick he spins in giddy gyres. Dryden.
Still expanding and ascending gyres. Mrs. Browning.
GYRE
Gyre, v. t. & i. Etym: [Cf. OF. gyrer, girer. See Gyrate.]
Defn: To turn round; to gyrate. [Obs.] Bp. Hall. Drayton.