noun
capacity or power to produce a desired effect (Freq. 6)
-
concern about the safety and efficacy of the vaccine
• Syn: ↑efficaciousness
• Ant: ↑inefficacy
• Derivationally related forms: ↑efficacious (for: ↑efficaciousness), ↑efficacious
• Hypernyms: ↑effectiveness, ↑effectivity, ↑effectualness, ↑effectuality
• Attrubites: ↑efficacious, ↑inefficacious
Useful english dictionary. 2012.