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

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What’s more impressive is that Iambic was able to move the treatment from its discovery phase to its clinical trial initiation in just two years — shaving years off what can be one of the most time-consuming aspects of new drug development. Brad Quick, CNBC, 19 May 2026 The AIs weren’t being asked to design entirely new molecules, and most drugs fail during the animal and clinical trials phase, rather than during testing in cell culture. ArsTechnica, 19 May 2026 Experimental vaccines have been tested in animal models, but none have completed the clinical trial pathway to approval. Jesse Pines, Forbes.com, 18 May 2026 The clinical trial, led by the Dana-Farber Cancer Institute and published in The New England Journal of Medicine, tested the drug in 168 patients with advanced pancreatic cancer whose tumors had mutations in the RAS gene. Angelica Stabile, FOXNews.com, 18 May 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 22 May. 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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