Definitions for efficaciousˌɛf ɪˈkeɪ ʃəs

This page provides all possible meanings and translations of the word efficacious

Random House Webster's College Dictionary

ef•fi•ca•cious*ˌɛf ɪˈkeɪ ʃəs(adj.)

  1. capable of having the desired result or effect; effective as a means, measure, or remedy.

* Syn: See effective.

Origin of efficacious:

1520–30; < L efficāx. See efficient , -acious


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

Translations for efficacious

Kernerman English Multilingual Dictionary


producing the result intended

The medicine was most efficacious.

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