adj ·6 syllables ·Rare ·Advanced level

Definitions

Adjective

1. 1
   Of, or relating to investigating, or to an investigation. not-comparable
2. 2
   of, or relating to an unapproved drug or chemical entity being studied. not-comparable

   "An expanded access protocol allows patients to benefit from an investigational drug prior to FDA approval."

Synonyms

All synonyms

analyticanalyticalexaminingexploratoryfact findingfeeling

Example

More examples

"An expanded access protocol allows patients to benefit from an investigational drug prior to FDA approval."

Etymology

From investigation + -al.

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.