/toong gooh"skeuh/ ; Russ. /toohn gooh"skeuh/ , n.
any of three tributaries of the Yenisei River in the central Russian Federation in Asia: includes the Lower Tunguska 2000 mi. (3220 km) long; the Upper Tunguska or the lower course of the Angara; and the Stony Tunguska ab. 975 mi. (1570 km) long.