efficaciousness vs efficacy what difference

what is difference between efficaciousness and efficacy

English

Etymology

efficacious +‎ -ness

Noun

efficaciousness (uncountable)

  1. Quality of being efficacious.


English

Etymology

From Old French efficace, from Late Latin efficācia (efficacy), from efficāx (efficacious); see efficacious.

Pronunciation

  • IPA(key): /ˈɛf.ɪ.kə.si/

Noun

efficacy (usually uncountable, plural efficacies)

  1. Ability to produce a desired effect under ideal testing conditions.
    • 2005, Flay et al. Standards of Evidence: Criteria for Efficacy, Effectiveness and Dissemination DOI: 10.1007/s11121-005-5553-y
      Efficacy refers to the beneficial effects of a program or policy under optimal conditions of delivery, whereas effectiveness refers to effects of a program or policy under more real-world conditions.
  2. Degree of ability to produce a desired effect.
    • 1996, Moskovich, Patent application PCT/US1996/003658
      Toothbrush with improved efficacy

Synonyms

  • efficacity

Related terms

Translations

Further reading

  • efficacy in Webster’s Revised Unabridged Dictionary, G. & C. Merriam, 1913.
  • efficacy in The Century Dictionary, New York, N.Y.: The Century Co., 1911.

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