Origin of efficacyMiddle English and Old French efficace from Classical Latin efficacia from efficax: see efficacious
Efficacy is defined as the ability to do what is defined as desired or to be effective at producing a result.
An example of efficacy is when a crime bill is effective at stopping crime.
Power or capacity to produce a desired effect; effectiveness.
Origin of efficacyLatin efficācia from efficāx efficāc- efficacious ; see efficacious .
- (uncountable) Ability to produce a desired amount of a desired effect.
- (8) They pray for spiritual welfare and believe in the efficacy of such prayers.
- He was a firm believer in the efficacy of culture.
- Just as the Mosaic dispensation came to an end with the appearance of Christ, so the sacraments of the new dispensation have lost their meaning and efficacy since the incarnation of God as Holy Spirit in the Amalricans.
- Thus he allowed the necessity of good works to salvation, but not in the old sense; proposed to allow the seven sacraments, but only as rites which had no inherent efficacy to salvation, and so on.
- The data shows pockets where radish efficacy is substantially higher and others where it is nonexistent.