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

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

  4. www.oxfordlearnersdictionaries.com › us › definitionefficacy 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.

  5. 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.

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

    noun. Power to produce effects or intended results; effectiveness. Webster's New World. Similar definitions. (uncountable) Ability to produce a desired amount of a desired effect. Wiktionary. Synonyms: efficaciousness. advantage. productiveness. potency. efficiency. effectiveness. influence. effectualness. effectuality. Antonyms: inefficacy.

  7. 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.

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

    The degree to which a method or medicine brings about a specific result is its efficacy. You might not like to eat it, but you can't question the efficacy of broccoli as a health benefit.

  9. www.britannica.com › dictionary › efficacyEfficacy Definition & Meaning | Britannica Dictionary

    The Britannica Dictionary. efficacy. 1 ENTRIES FOUND: efficacy (noun) efficacy / ˈ ɛfɪkəsi/ noun. Britannica Dictionary definition of EFFICACY. [noncount] formal. : the power to produce a desired result or effect. The efficacy [= effectiveness] of this treatment has not yet been proved.

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

    efficacy n eficacia, efectividad f; (clinical research) eficacia bajo condiciones controladas; [Note: While English-speaking health professionals often distinguish between efficacy and effectiveness, most Spanish-speaking health professionals use eficacia and efectividad interchangeably.]

  11. www.ldoceonline.com › dictionary › efficacyefficacy - Longman Dictionary of Contemporary English Online

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