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clinical trial

American

the scientific investigation of a new treatment that has shown some benefit in animal or laboratory studies, but that has not yet been proven effective in humans.

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

A new drug extended life by nearly half a year in a clinical trial.

From The Wall Street Journal • Apr. 19, 2026

A clinical trial on a method partly used to train Sunny found promising results.

From The Wall Street Journal • Apr. 18, 2026

A new clinical trial led by researchers at Queen Mary University of London suggests that a single injection given every six months may significantly lower blood pressure over time.

From Science Daily • Apr. 13, 2026

Ideaya Biosciences surged 13% after the biotechnology company released positive, statistically significant results from a clinical trial evaluating the efficacy of a combination therapy in patients with a rare form of eye cancer.

From Barron's • Apr. 13, 2026

Their fifty-three patients were, in effect, a clinical trial, and an astonishingly successful one.

From "Mountains Beyond Mountains" by Tracy Kidder and Michael French

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023