efficacious
Americanadjective
adjective
Usage
What are other ways to say efficacious? The adjective efficacious describes things that are capable of having the desired result or effect. But efficacious isn’t quite the same as effectual, effective, or efficient! Find out why on Thesaurus.com.
Other Word Forms
- efficaciously adverb
- efficaciousness noun
- nonefficacious adjective
- nonefficaciously adverb
- unefficacious adjective
- unefficaciously adverb
Etymology
Origin of efficacious
First recorded in 1520–30; from Latin efficāci- (stem of efficax ) “effectual.” See efficient, -acious
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Instead of manipulating government for their own narrow interests, the rich can add a distinctively independent-minded, public-spirited and efficacious set of voices to the national debate.
“The beauty of it is it’s gentle but also highly efficacious.”
From Los Angeles Times
In a paper published in Molecular Psychiatry, researchers outline a new framework for understanding how antidepressants are efficacious in treating MDD.
From Science Daily
“If something was to be made available and shown to be efficacious and safe, I think there would be wide use of it,” Jonker says.
From Science Magazine
The low dose was a little more than 65% efficacious in both cases.
From Science Magazine
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
