efficacy

[ ef-i-kuh-see ]
/ ˈɛf ɪ kə si /
SEE SYNONYMS FOR efficacy ON THESAURUS.COM

noun, plural ef·fi·ca·cies.

capacity for producing a desired result or effect; effectiveness: a remedy of great efficacy.

Origin of efficacy

1520–30; < Latin efficācia, equivalent to efficāc- (see efficacious) + -ia -y3

OTHER WORDS FROM efficacy

non·ef·fi·ca·cy, noun

Words nearby efficacy

effervescent, effervescent salt, effete, efficacious, efficacity, efficacy, efficiency, efficiency apartment, efficiency expert, efficient, efficient cause

Words related to efficacies

adequacy, effectiveness, competence, virtue, potency, vigor, use, strength, force, ability, power, efficaciousness, energy, influence, effect, weight, capability, performance, success, sufficiency

British Dictionary definitions for efficacies

efficacy
/ (ˈɛfɪkəsɪ) /

noun

the quality of being successful in producing an intended result; effectiveness