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investigational

American  
[in-ves-ti-gay-shuhn-uhl] / ɪnˌvɛs tɪˈgeɪ ʃən əl /

adjective

  1. relating to, engaged in, or involving investigation, or any process of thorough examination, research, inquiry, etc.


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.

Zilebesiran is an investigational drug that uses RNA interference technology to reduce blood pressure.

From Science Daily • Apr. 13, 2026

In a statement Monday, they said that the investigational LB6V vaccine demonstrated more than 70% efficacy in preventing Lyme disease in individuals aged five and older.

From The Wall Street Journal • Mar. 23, 2026

AMT-130 is an investigational gene therapy for Huntington’s disease, which the FDA granted a Breakthrough Therapy designation earlier this year.

From Barron's • Nov. 3, 2025

“Small samples like this aren’t good for establishing the benefits of a treatment, conclusively showing safety or demonstrating that an investigational treatment is better than placebo,” Conelea said.

From Los Angeles Times • Sep. 5, 2024

This question of compatibility between stock and scion is of the utmost importance and it impedes investigational work, complicating comparisons we are trying to make.

From Northern Nut Growers Association Report of the Proceedings at the Thirty-Seventh Annual Report Wooster, Ohio, September 3, 4, 5, 1946 by Northern Nut Growers Association

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