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

  2. efficacious: 1 adj marked by qualities giving the power to produce an intended effect “"written propaganda is less efficacious than the habits and prejudices...of the readers"-Aldous Huxley” “the medicine is efficacious in stopping a cough” Synonyms: effective , effectual producing or capable of producing an intended result or having a ...

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

  4. capable of having the desired result or effect; effective as a means, measure, remedy, etc

  5. 1 ENTRIES FOUND: efficacious (adjective) efficacious /ˌɛfə ˈ keɪʃəs/ adjective. Britannica Dictionary definition of EFFICACIOUS. [more efficacious; most efficacious] formal. : having the power to produce a desired result or effect : effective. an efficacious remedy.

  6. efficacious: See: active , beneficial , cogent , competent , efficient , functional , influential , politic , potent , powerful , practical , predominant , prevailing ...

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