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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.

Duodenal mucosal resurfacing is an investigational endoscopic treatment that uses controlled heat to remove damaged tissue from the inner lining of the duodenum, the first section of the small intestine just below the stomach.

From Science Daily • Apr. 23, 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

One of the important investigational programs is concerned with the relationship of the pituitary gland to the growth rate of certain cancers and to some endocrine disorders.

From LRL Accelerators The 184-Inch Synchrocyclotron by Laboratory, Lawrence Radiation

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