Amadeus, Lake(əmă`dēəs), large, usually dry, shallow salt lake, 340 sq mi (881 sq km), 76 mi (122 km) long, 12 mi (19 km) wide, SW Northern Territory, Australia. The lakebed is usually covered with a thick crust of white salt crystals, but during periods of heavy rain can contain a few inches of water. The lake was formed by sediment from the neighboring MacDonnell and Musgrave ranges. It was named (1872) for King AmadeusAmadeus,
1845–90, king of Spain (1870–73), duke of Aosta, son of Victor Emmanuel II of Italy. After the expulsion (1868) of Queen Isabella II, Juan Prim urged the Cortes to elect Amadeus as king. He accepted the crown reluctantly.
..... Click the link for more information. of Spain, by the explorer Ernest Giles.