efficacy
the capacity for producing a desired result or effect: Short, frequent periods of practice were shown to have greater efficacy than longer and less frequent ones.
a measure of the success of a vaccine or other pharmaceutical when used in the controlled environment of a clinical trial, as opposed to in the real world.: Compare effectiveness (def. 3).
Origin of efficacy
1- Sometimes ef·fi·cac·i·ty [ef-i-kas-i-tee] /ˌɛf ɪˈkæs ɪ ti/ .
Other words from efficacy
- non·ef·fi·ca·cy, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024
How to use efficacy in a sentence
That these two are different will easily be clear to anyone who passes in review their respective efficacies.
The Consolation of Philosophy | BoethiusIn silence and secrecy thought has been working, and the benignant efficacies of concealment speak for themselves.
Ku Klux Klan | J. C. Lester
British Dictionary definitions for efficacy
/ (ˈɛfɪkəsɪ) /
the quality of being successful in producing an intended result; effectiveness
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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