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  1. The meaning of EFFICACY is the power to produce an effect. How to use efficacy in a sentence.

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  3. EFFICACY definition: 1. the ability of something to produce the intended result: 2. how well a particular treatment or…. Learn more.

  4. Efficacy definition: the capacity for producing a desired result or effect. See examples of EFFICACY used in a sentence.

  5. The effectiveness, or efficacy, of something is how well it works or brings the results you hoped for. A scientist does research to determine the efficacy of a vaccine or medicine under development. If it is efficacious, it will cure or prevent a disease.

  6. If you talk about the efficacy of something, you are talking about its effectiveness and its ability to do what it is supposed to. Recent medical studies confirm the efficacy of a healthier lifestyle.

  7. Define efficacy. efficacy synonyms, efficacy pronunciation, efficacy translation, English dictionary definition of efficacy. n. Power or capacity to produce a desired effect; effectiveness.

  8. Efficacy definition: Power or capacity to produce a desired effect; effectiveness.

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