ˌsüˌīˈjenərə̇s; ˌsüēˈje-, -ēˈge- adjective
Etymology: Latin, of its own kind
: constituting a class alone : unique , peculiar
possesses certain sui generis qualities — John Mason Brown
— usually used predicatively or postpositively
the man is sui generis — John McCarten
a history book sui generis — Max Wolff