Efficacy

Quick meaning: Efficacy is a noun meaning The ability to produce a desired effect under ideal testing conditions.

Meaning

The ability to produce a desired effect under ideal testing conditions.

More Meanings

1. A degree of ability to produce a desired effect; effectiveness.

Example Sentences

Toothbrush with improved efficacy

[…]and this hath even made me ſuſpect the efficacy of reliques, to examine the bones, queſtion the habits and appurtenances of Saints, and even of Chriſt himſelf.

2005, Flay et al. Standards of Evidence: Criteria for Efficacy, Effectiveness and Dissemination DOI: 10.1007/s11121-005-5553-y Efficacy refers to the beneficial effects of a program or policy under optimal conditions of delivery, whereas effectiveness refers to effects of a program or policy under more real-world conditions.

No method of verification known to science is applicable to the efficacy of prayer. […] If, then, the efficacy of prayer eludes the test of science, and if even uncertainty may rest upon the connection between an event asked in prayer, and the prayer that sought it, is there any evidence by which the efficacy of prayer may be tested and known?

Word Forms

• efficacies

Synonyms for efficacy

Depending on context, synonyms include efficaciousness.

Antonyms for efficacy

Common opposites include inefficacy, inefficaciousness.

Related Words

Related dictionary entries include efficaciousness, efficacious, effective, effectiveness, usefulness, utility.

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