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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It was tested in a clinical trial with over 2,000 participants and introduced alongside the Apple Watch Series 11 earlier this week. PC Magazine, 12 Sep. 2025 These findings are an important first step and set the stage for other clinical trials to see whether azelastine can reliably reduce the risk of respiratory virus infections. Katia Hetter, CNN Money, 12 Sep. 2025 More than $18 billion has flooded into more than 200 biotechnology companies touting AI to expedite development, with 75 drugs or vaccines entering clinical trials, according to Boston Consulting Group. Sasha Rogelberg, Fortune, 12 Sep. 2025 Some clinical trials show short-term weight loss and better blood sugar control in people with type 2 diabetes,3 but these benefits often plateau within the year. Caitlin Pagán, Verywell Health, 11 Sep. 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 16 Sep. 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

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