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. 2003Vaccines 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
questioned the efficacy of the alarms in actually preventing auto theft
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More than 100 scientific studies have been conducted to examine the safety and efficacy of using mifepristone and misoprostol to end a pregnancy.—Alejandra O’Connell-Domenech, The Hill, 19 May 2025 The close call, however, prompted Congress to require more rigorous safety and efficacy data from drug manufacturers and empower the FDA to monitor the industry more closely.—David Armstrong, CNN Money, 10 May 2025 Pharmaceutical companies have agreed to pay Hawaii $700 million to settle its lawsuit over the efficacy and safety of the blood thinner Plavix, the state attorney general's office announced Friday.—CBS News, 10 May 2025 Furthermore, in light of the study’s findings, the Financial Accounting Standards Board will want to carefully monitor the efficacy of the new tax disclosures in their post-implementation review to mitigate concerns associated with companies lowering the quality of their tax disclosures.—Nathan Goldman, Forbes.com, 9 May 2025 See All Example Sentences for efficacy
Word History
Etymology
borrowed from Latin efficācia, from efficāc-, efficāx "capable of fulfilling a function, efficacious" + -ia-y entry 2
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