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  1. Dictionary
    efficacy
    /ˈɛfɪkəsi/

    noun

    • 1. the ability to produce a desired or intended result: formal "there is little information on the efficacy of this treatment"

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    More definitions, origin and scrabble points

  2. dictionary.cambridge.org › dictionary › englishEFFICACY | English meaning - Cambridge Dictionary

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

  3. dictionary.cambridge.org › us › dictionaryEFFICACY | definition in the Cambridge English Dictionary

    the ability of something to produce the intended result: The study is a serious attempt to understand the efficacy of cash incentives as a way of promoting learning. Synonyms. effectiveness. efficacity. medical specialized. how well a particular treatment or drug works under carefully controlled scientific testing conditions:

  4. www.merriam-webster.com › dictionary › efficacyEfficacy Definition & Meaning - Merriam-Webster

    : the power to produce an effect. Synonyms. edge. effectiveness. effectualness. efficaciousness. efficacity. efficiency. productiveness. See all Synonyms & Antonyms in Thesaurus. Examples of efficacy in a Sentence. In the planner's view, Rumsfeld had two goals: to demonstrate the efficacy of precision bombing and to "do the war on the cheap."

  5. www.collinsdictionary.com › dictionary › englishEFFICACY definition and meaning | Collins English Dictionary

    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.

  6. www.vocabulary.com › dictionary › efficacyEfficacy - Definition, Meaning & Synonyms | Vocabulary.com

    Efficacy is a more formal way to say effectiveness, both of which stem from the Latin verb efficere "to work out, accomplish." The effectiveness, or efficacy, of something is how well it works or brings the results you hoped for.

  7. www.dictionary.com › browse › efficacyEFFICACY Definition & Meaning | Dictionary.com

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

  8. www.oxfordlearnersdictionaries.com › definition › englishefficacy noun - Definition, pictures, pronunciation and usage...

    Definition of efficacy noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

  9. www.yourdictionary.com › efficacyEfficacy Definition & Meaning | YourDictionary

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

  10. www.thefreedictionary.com › efficacyEfficacy - definition of efficacy by The Free Dictionary

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

  11. www.ldoceonline.com › dictionary › efficacyefficacy | meaning of efficacy in Longman Dictionary of...

    efficacy meaning, definition, what is efficacy: the ability of something to produce the ...: Learn more.