efficacy
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About Our Definitions: All forms of a word (noun, verb, etc.) are now displayed on one page.ef·fi·ca·cy
noun \ˈe-fi-kə-sē\ plural ef·fi·ca·cies
Definition of EFFICACY
: the power to produce an effect
See Examples of EFFICACY
- <questioned the efficacy of the alarms in actually preventing auto theft>
- In the planner's view, Rumsfeld had two goals: to demonstrate the efficacy of precision bombing and to “do the war on the cheap.” —Seymour M. Hersh, New Yorker, 7 Apr. 2003
- Vaccines exist, but their efficacy against aerosolized plague is unknown. —Sharon Begley et al., Newsweek, 8 Oct. 2001
- … efficacy does not have to be demonstrated before homeopathic products are marketed. —Alison Abbott et al., Nature, 26 Sept. 1996
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Origin of EFFICACY
(see efficacious)
First Known Use: 13th century
Related to EFFICACY
- Synonyms
- edge, effectiveness, effectualness, efficaciousness, efficacity, efficiency, productiveness
- Antonyms
- ineffectiveness, ineffectuality, ineffectualness, inefficiency
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