Definitions for efficacyˈɛf ɪ kə si

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Random House Webster's College Dictionary

ef•fi•ca•cyˈɛf ɪ kə si(n.)

  1. capacity for producing a desired result or effect; effectiveness.

Origin of efficacy:

1520–30; < L

Princeton's WordNet

  1. efficacy, efficaciousness(noun)

    capacity or power to produce a desired effect

    "concern about the safety and efficacy of the vaccine"

Wiktionary

  1. efficacy(Noun)

    Ability to produce a desired amount of a desired effect.

  2. Origin: From efficacia, from efficax; see efficacious.

Webster Dictionary

  1. Efficacy(noun)

    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


Translations for efficacy

Kernerman English Multilingual Dictionary

efficacy(noun)

producing the result intended

The medicine was most efficacious.

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