a former country in E Africa: formed the larger part of German East Africa; British trusteeship (Tanganyika Territory) 1946–61; became independent 1961; now the mainland part of Tanzania. 361,800 sq. mi. (937,062 sq. km).
Lake, a lake in central Africa, between the Democratic Republic of the Congo and Tanzania: the longest freshwater lake in the world. About 450 miles (725 km) long; 30–40 miles (48–64 km) wide; 12,700 sq. mi. (32,893 sq. km).
British Dictionary definitions for tanganyika lake
a former state in E Africa: became part of German East Africa in 1884; ceded to Britain as a League of Nations mandate in 1919 and as a UN trust territory in 1946; gained independence in 1961 and united with Zanzibar in 1964 as the United Republic of Tanzania
Lake Tanganyika, a lake in central Africa between Tanzania and the Democratic Republic of Congo (formerly Zaïre), bordering also on Burundi and Zambia, in the Great Rift Valley: the longest freshwater lake in the world. Area: 32 893 sq km (12 700 sq miles). Length: 676 km (420 miles)