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{%type%} Definitions

WordNet 3.0Copyright Princeton University
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adj. - Producing or capable of producing an intended result or having a striking effect; Marked by qualities giving the power to produce an intended effect.

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Usage examples (34)
  • The aim of the new study is to find the most efficacious treatments for the disease.
  • Written propaganda is less efficacious than the habits and prejudices...of the readers
  • The special grace which we refer to as efficacious is sometimes called irresistible grace.
  • 'efficacious' - despite the fact that the chemist sells the medicines.
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The Open Dictionary of English is a collaborative project, based on Open Source materials, LearnThat resources, and partner APIs.
We give special thanks to our LearnThat volunteers, as well as Princeton University and Wiktionary for their Open Source word data. We're also grateful for the support given by Google, Wordnik.com, Dictionary.com, Stands4.com and YouTube, OEDILF.com, Kylescholz.com, Best-Practice.com, Forvo.com, as well as the generous Creative Commons community.