clinical trial

noun

: a scientifically controlled study of the safety and effectiveness of a therapeutic agent (such as a drug or vaccine) using consenting human subjects

Examples of clinical trial in a Sentence

Recent Examples on the Web
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The single clinical trial that was initiated was canceled. Vikas Patel, STAT, 3 Apr. 2026 And in another clinical trial, injections of 15-mg doses of tirzepatide (the active ingredient in Eli Lilly’s weight-loss injectable Zepbound) resulted in an average of about 21 percent body-weight reductions after 72 weeks. Lauren J. Young, Scientific American, 2 Apr. 2026 This support could enable them to get timely access to the right treatments and clinical trials. Rhonda Winegar, Fortune, 1 Apr. 2026 In a clinical trial, people who initiated and stayed on the highest dose of Foundayo lost an average of about 27 pounds, compared to about 2 pounds on a placebo. Katie Wiseman, IndyStar, 1 Apr. 2026 See All Example Sentences for clinical trial

Word History

First Known Use

1946, in the meaning defined above

Time Traveler
The first known use of clinical trial was in 1946

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Cite this Entry

“Clinical trial.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/clinical%20trial. Accessed 5 Apr. 2026.

Medical Definition

clinical trial

noun
: a scientifically controlled study of the safety and effectiveness of a therapeutic agent (as a drug or vaccine) using consenting human subjects

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