English noun: efficacy | |||
1. | efficacy (attribute) capacity or power to produce a desired effect | ||
Samples | Concern about the safety and efficacy of the vaccine. | ||
Synonyms | efficaciousness | ||
Broader (hypernym) | effectiveness, effectivity, effectuality, effectualness | ||
Attribute | efficacious, inefficacious | ||
Antonyms | inefficaciousness, inefficacy | ||