efficacy

EnglishEdit

EtymologyEdit

From Old French efficace, from Late Latin efficacia (efficacy), from Latin efficax (efficacious); see efficacious.

PronunciationEdit

NounEdit

efficacy (uncountable)

  1. (uncountable) Ability to produce a desired amount of a desired effect.

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Last modified on 10 March 2014, at 22:16