gȳrus, i, m., = γῦρος, a circle, esp. that which is described by a horse in its movements (mostly poet.; cf.: circus, circulus, orbis, orbita). Lit.: nec equi variare gyros in morem nostrum docentur, Tac. G. 6; so of a circular course, ring, for horses, Verg. G. 3, 115: carpere gyrum, id. ib. 3, 191: curvo brevius compellere gyro, Tib. 4, 1, 93; Manil. 5, 74; Ov. A. A. 3, 384; Luc. 1, 425 et saep.: adytis cum lubricus anguis ab imis Septem ingens gyros, septena volumina traxit, Verg. A. 5, 85: ducensque per aera gyros Miluus, Ov. Am. 2, 6, 33: apes gyros volatu edunt, Plin. 11, 20, 22, § 68: grues gyros quosdam indecoro cursu peragunt, id. 10, 23, 30, § 59: quem (turbinem) pueri magno in gyro...intenti ludo exercent, Verg. A. 7, 379: in gyrum Euripo addito (in Circo), i. e. around, round about, Suet. Caes. 39.

— Transf., the place where horses are trained, a course (poet.): gyrum pulsat equis, Prop. 3, 14 (4, 13), 11.

— Trop., a circle, circuit, career, course: mensis artiore (quam annus) praecingitur circulo; angustissimum habet dies gyrum, Sen. Ep. 12; cf.: seu bruma nivalem Interiore diem gyro trahit, Hor. S. 2, 6, 26: similique gyro venient aliorum vices, circuit, course, Phaedr. 4, 26, 25: homines secundis rebus effrenatos tamquam in gyrum rationis et doctrinae duci oportere, Cic. Off. 1, 26, 70: oratorem in exiguum gyrum compellere, id. de Or. 3, 19, 70; Prop. 3, 3 (4, 2), 21; cf.: attrahe vela Fortius et gyro curre, poeta, tuo, Ov. R. Am. 398: in dialecticae gyris consenescere, Gell. 16, 8, 17.