Also 5–6 efficacite, 6–7 -itie. [ad. L. efficācitāt-em (cf. F. efficacité, but this may be of later origin), f. efficax: see EFFICACE a.] = prec. and next.
1430–50. trans. Higden (1865), I. 61. [The occean] felethe by more efficacite the strenghte of ye moone then a see coartate.
1528. Roy, Sat. (1845). Yf their paynted efficacite Is but as it semeth to be.
1543. Traheron, Vigo’s Chirurg., V. v. 170. The oyle of … saint Jhons wort is of singuler efficacitie, in all paynes of … the knee.
1624. F. White, Repl. Fisher, 539–40. I could bring Testimonies … of the efficacitie thereof to expiate sinne.
1678. Gale, Crt. Gentiles, III. 3. We may firmly assert and demonstrate the efficacitie of Divine concurse.
1775. Ash, Efficacity (from Efficacy, but not much used) Efficacy.
1868. Browning, Ring & Bk., IX. 150. Better estimate exorbitantly, than disparage Aught of the efficacity of the act.
1874. Lewes, Problems Life & Mind, I. 114. The efficacity of Intelligence depends on the organs which co-operate.
1886. Sat. Rev., 21 Aug., 251/1. The National Liberal Federation … a monument of the efficacity … of programmes and delegacy.
