noun
capacity or power to produce a desired effect
-
concern about the safety and efficacy of the vaccine
• Syn: ↑efficacy
• Ant: ↑inefficacy (for: ↑efficacy)
• Derivationally related forms: ↑efficacious, ↑efficacious (for: ↑efficacy)
• Hypernyms: ↑effectiveness, ↑effectivity, ↑effectualness, ↑effectuality
• Attrubites: ↑efficacious, ↑inefficacious
Useful english dictionary. 2012.