efficacy

/หˆษ›f.ษช.kษ™.si/

IPA: /EH1 F IH0 K AE0 S IY0/

noun
  1. 1

    Ability to produce a desired effect under ideal testing conditions.

  2. 2

    Degree of ability to produce a desired effect.

Synonyms

Source: https://en.wiktionary.org/wiki/efficacy