sui generis adjective
being the one or ones of a class with no other members <among history's greats Leonardo da Vinci is often considered sui generis—a man of such stupendous genius that the world may never see his like again> Related Words single
Near Antonyms divers
Seen & Heard
What made you want to look up sui generis? Please tell us where you read or heard it (including the quote, if possible).