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Definitions of efficacy

  1. capacity or power to produce a desired effect Scrapingweb Dictionary DB
  2. capacity or power to produce a desired effect; "concern about the safety and efficacy of the vaccine" Wordnet Dictionary DB
  3. Power to produce effects; operation or energy of an agent or force; production of the effect intended; as, the efficacy of medicine in counteracting disease; the efficacy of prayer. Webster Dictionary DB
  4. Power to produce results or effects; ability; efficiency; energy; agency. The Winston Simplified Dictionary. By William Dodge Lewis, Edgar Arthur Singer. Published 1919.
  5. Virtue: energy. The american dictionary of the english language. By Daniel Lyons. Published 1899.
  6. Efficacious. The Concise Standard Dictionary of the English Language. By James Champlin Fernald. Published 1919.
  7. Power to produce effects; virtue; energy. The Clarendon dictionary. By William Hand Browne, Samuel Stehman Haldeman. Published 1894.
  8. Power to produce effect; effective energy. The Concise Standard Dictionary of the English Language. By James Champlin Fernald. Published 1919.
  9. Power to produce a given effect. Nuttall's Standard dictionary of the English language. By Nuttall, P.Austin. Published 1914.
  10. Power to produce effects; virtue; power; ability. Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.
  11. n. Power to produce effects; production of the effect intended; virtue; force; energy. Cabinet Dictionary
  12. Production of the consequence intended. Complete Dictionary

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