Dictionary
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>
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First Known Use of INVESTIGATIONAL
1905
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