efficacy

[ ef-i-kuh-see ]
/ ˈɛf ɪ kə si /

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

British Dictionary definitions for efficacies

efficacy
/ (ˈɛfɪkəsɪ) /

noun

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