Webster’s Revised Unabridged Dictionary · 1913
Efficacity
Ef′fi·cac′i·ty (·kăs′ĭ·ty̆), n. [L. efficacitas: cf. F. efficacité.] Efficacy. [R.] J. Fryth.
Webster’s Revised Unabridged Dictionary · 1913
Ef′fi·cac′i·ty (·kăs′ĭ·ty̆), n. [L. efficacitas: cf. F. efficacité.] Efficacy. [R.] J. Fryth.