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Definitions of efficacious

  1. producing or capable of producing an intended result or having a striking effect; "an air-cooled motor was more effective than a witch's broomstick for rapid long-distance transportation"-LewisMumford; "effective teaching methods"; "effective steps toward peace"; "made an effective entrance"; "his complaint proved to be effectual in bringing action"; "an efficacious law" Wordnet Dictionary DB
  2. 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" Scrapingweb Dictionary DB
  3. Possessing the quality of being effective; productive of, or powerful to produce, the effect intended; as, an efficacious law. Webster Dictionary DB
  4. Producing, or capable of producing, a desired effect. The Winston Simplified Dictionary. By William Dodge Lewis, Edgar Arthur Singer. Published 1919.
  5. Efficaciously. The Concise Standard Dictionary of the English Language. By James Champlin Fernald. Published 1919.
  6. Efficaciousness. The Concise Standard Dictionary of the English Language. By James Champlin Fernald. Published 1919.
  7. Able to produce the result intended. The american dictionary of the english language. By Daniel Lyons. Published 1899.
  8. Having efficacy; effective; effectual. The Concise Standard Dictionary of the English Language. By James Champlin Fernald. Published 1919.
  9. Adequate to produce the effect intended. Nuttall's Standard dictionary of the English language. By Nuttall, P.Austin. Published 1914.
  10. Producing the effect intended; effectual. Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.
  11. ef-fi-k[=a]'shus, adj. able to produce the result intended.--adv. EFFIC[=A]'CIOUSLY.--ns. EFFIC[=A]'CIOUSNESS; EFFICAC'ITY; EF'FICACY, virtue: energy. [Fr.,--L. efficax, efficacis--effic[)e]re.] gutenberg.org/ebooks/37683
  12. That which produces a great effect,-as an efficacious remedy. Medicina efficax, La Medecine efficace, is a term sometimes applied to surgery. Medical Lexicon. A Dictionary of Medical Science
  13. (Of thing) producing, sure to produce, desired effect. Hence or cogn. efficaciously adv., efficaciousness, efficacy, nn. [Latin] Concise Oxford Dictionary
  14. Productive of effects, powerful to produce the consequence intended. Complete Dictionary
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