Dictionary

investigational

investigational

adjective in·ves·ti·ga·tion·al \in-ˌves-tə-ˈgā-shnəl, -shə-nəl\

Definition of INVESTIGATIONAL

1
:  of or relating to investigation <investigational activities>
2
:  relating to or being a drug or medical procedure that is not approved for general use but is under investigation in clinical trials regarding its safety and efficacy <an investigational new drug>

First Known Use of INVESTIGATIONAL

1905

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