effectĭo (noun F) : efficio (only in the philos. lang. of Cicero).
* A doing, performing, effecting, practising: artis,Cic. Fin. 3, 7, 24: recta (a transl. of κατόρθωσις), id. ib. 3, 14, 45.—*
* I. q. causa efficiens, the producing or efficient cause, Cic. Ac. 1, 2, 6.

s. TLL