adjective in·ves·ti·ga·tion·al \in-ˌve-stə-ˈgā-shnəl, -shə-nəl\

Definition of investigational

  1. 1 :  of or relating to investigation investigational activities

  2. 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


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