WWordGenerator.org GeneratorsWord ListsBlogAboutGenerate a word Home / P / principal investigator principal investigator noun 22 letters Scrabble 31 WWF 39 Definitions noun the scientist in charge of an experiment or research project pi Look “principal investigator” up elsewhere Wiktionary ↗ Merriam-Webster ↗ Etymonline ↗ Dictionary.com ↗ Want another word?Spin the dictionary for a fresh one. Generate a word →