What does efficacious mean?

Definitions for efficaciousˌɛf ɪˈkeɪ ʃəs

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

Princeton's WordNet

  1. efficacious(adj)

    marked by qualities giving the power to produce an intended effect

    "written propaganda is less efficacious than the habits and prejudices...of the readers"-Aldous Huxley; "the medicine is efficacious in stopping a cough"

  2. effective, effectual, efficacious(adj)

    producing or capable of producing an intended result or having a striking effect

    "an air-cooled motor was more effective than a witch's broomstick for rapid long-distance transportation"-LewisMumford; "effective teaching methods"; "effective steps toward peace"; "made an effective entrance"; "his complaint proved to be effectual in bringing action"; "an efficacious law"


  1. efficacious(Adjective)


  2. Origin: From efficacieux, from efficax, from efficere; see effect.

Webster Dictionary

  1. Efficacious(noun)

    possessing the quality of being effective; productive of, or powerful to produce, the effect intended; as, an efficacious law

Chambers 20th Century Dictionary

  1. Efficacious

    ef-fi-kā′shus, adj. able to produce the result intended.—adv. Efficā′ciously.—ns. Efficā′ciousness; Efficac′ity; Ef′ficacy, virtue: energy. [Fr.,—L. efficax, efficacisefficĕre.]


  1. Chaldean Numerology

    The numerical value of efficacious in Chaldean Numerology is: 1

  2. Pythagorean Numerology

    The numerical value of efficacious in Pythagorean Numerology is: 7

Sample Sentences & Example Usage

  1. Julie Strickland:

    The more we can get out there to show that it’s safe and efficacious and really well tolerated and well liked among young adults, the better.

  2. David Anderson:

    It looks to me like they're doing studies to determine if the lower dosages are efficacious in improving feed efficiency, growth rate and carcass leanness.

  3. Carolyn Lam Su Ping:

    If you have a mood or anxiety disorder, many excellent treatments are available; the most efficacious is some form of cognitive-behavior therapy with or without medication.

  4. Dorothy Sayers:

    The best remedy for a bruised heart is not, as so many people seem to think, repose upon a manly bosom. Much more efficacious are honest work, physical activity, and sudden acquisition of wealth.

  5. Nora Volkow:

    One of the things is, we don't have any evidence-based medication that has proven to be efficacious for the treatment of cocaine addiction, so we currently have no medicine to intervene, and it can be a very severe addiction and actually quite dangerous.

Images & Illustrations of efficacious

  1. efficaciousefficaciousefficacious

Translations for efficacious

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"efficacious." Definitions.net. STANDS4 LLC, 2018. Web. 19 Feb. 2018. <https://www.definitions.net/definition/efficacious>.

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