What does efficacy mean?

Definitions for efficacyˈɛf ɪ kə si

Here are all the possible meanings and translations of the word efficacy.

Princeton's WordNet

  1. efficacy, efficaciousness(noun)

    capacity or power to produce a desired effect

    "concern about the safety and efficacy of the vaccine"


  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


  1. Efficacy

    Efficacy is the capacity to produce an effect. It has different specific meanings in different fields. In medicine, it is the ability of an intervention or drug to produce a desired effect.


  1. Chaldean Numerology

    The numerical value of efficacy in Chaldean Numerology is: 3

  2. Pythagorean Numerology

    The numerical value of efficacy in Pythagorean Numerology is: 4

Sample Sentences & Example Usage

  1. Dwight Reynolds:

    Both the safety and efficacy endpoints were hit with flying colors.

  2. Brian Greenwood:

    Despite the falling efficacy over time, there is still a clear benefit from RTS,S.

  3. Justin Masuka:

    The answer to Efficacy lies in the hand of excellent management, reliable systems and good governess"

  4. Michael Springborn:

    This suggests that efforts to utilize social distancing to mitigate disease spread may have a limited window of efficacy.

  5. John Boris:

    If they're getting brain swelling at 10 mgs and their 6 mg dose is showing limited efficacy, it draws into question Biogen's program.

Images & Illustrations of efficacy

  1. efficacyefficacyefficacy

Translations for efficacy

From our Multilingual Translation Dictionary

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"efficacy." Definitions.net. STANDS4 LLC, 2018. Web. 24 Apr. 2018. <https://www.definitions.net/definition/efficacy>.

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