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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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Otherwise, it would be used in a clinical trial or study to treat another important medical condition. New Atlas, 28 Nov. 2025 Although patients on semaglutide, the drug in Ozempic and Wegovy, lost on average 10 percent of their body weight, a third lost less than 5 percent in one clinical trial. Sarah Zhang, The Atlantic, 28 Nov. 2025 Earlier this month, Hammond celebrated National Rural Health Day by celebrating VCU Health Tappahannock Hospital’s first cancer clinical trial, making new treatments more accessible to rural communities. Lauren Giella, MSNBC Newsweek, 26 Nov. 2025 Meanwhile, another company, Metsera, has several obesity drugs in its pipeline, though none is in late-stage clinical trials yet. NPR, 25 Nov. 2025 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 1 Dec. 2025.

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

More from Merriam-Webster on clinical trial

Last Updated: - Updated example sentences
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