Lewis Short
(adjective) = σφαιρικός: sphaerĭcus, a, um
* Of or belonging to a ball, spherical: motus,Macr. Somn. Scip. 2, 14, 31: numeri, Boëth. Inst. Arith. 2, 4.—Hence, subst.: sphaerĭca, ae, f., spherics, the science of heavenly motions, Boëth. Inst. Arith. 1, 1, p. 11.
Charlton T. Lewis, Charles Short, A Latin Dictionary