# investigational

> English word · Adjective · frequency rank #50,009

## Definitions
1. Of, or relating to investigating, or to an investigation.
2. of, or relating to an unapproved drug or chemical entity being studied.

## Etymology
From investigation + -al.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/investigational