The Tanuga system was an inhabited star system. The planet Tanuga IV was the homeworld for the Tanugans, a highly advanced humanoid species.
The USS Enterprise-D visited the Tanuga system in 2366 to deliver dicosilium to the Tanugan scientist Doctor Nel Apgar. (TNG: "A Matter of Perspective")
According to the script, the pronunciation for Tanuga was "TAN-ooh-guh".