Wiktionary
investigational
a. 1 Of, or relating to investigating, or to an investigation. 2 (context medicine English) of, or relating to an unapproved drug or chemical entity being studied.
Usage examples of "investigational".
We’ll have to do all this before we file an investigational new drug application with the FDA, which is what you have to do before you can even start the clinical phase.
I can’t imagine that they would sanction it, and it might cause trouble when they attempt to get an Investigational New Drug application.
Why not just implant a record strip, as was done all the time for people with investigational diseases?
In a perfect world, speaking from an investigational standpoint, everything would be shared, but everyone likes to keep some secrets, no?