adjective Date: 1905 of or relating to investigation , 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
INVESTIGATIONAL
Meaning of INVESTIGATIONAL in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012