Ask at the forum if you have an Ancient or Modern Greek query!
rŏtātĭo: ōnis, f. id.,I a wheeling or turning about in a circle, rotation: circini, Vitr. 10, 3 init. et fin.
rŏtātĭō, ōnis, f. (roto), action de mouvoir en rond, de faire tourner, rotation : Vitr. Arch. 8, 3, 1.