anything that runs round:
I.a round cake, Od.
II.a wheel, Il., Soph.; τροχοὺς μιμεῖσθαι to imitate wheels, of one who bends back so as to form a wheel, Xen.
2.a potter's wheel, Il.
3.the wheel of a stage-machine, Ar.
III.a boy's hoop, the Graecus trochus of Hor.
V.a ring on the bit of a bridle, Xen.
B.τρόχος, a running, course, μὴ πολλοὺς τρόχους ἁμιλλητῆρας ἡλίου not many racing courses of the sun, i. e. not many days, Soph.; παῖδες ἐκ τρόχων πεπαυμένοι Eur.
2.a race-course, id=Eur.
