In 1943 the name was changed to Uruaçu, which in Tupi-Guaraní means "large bird". In 1948 Uruaçu lost the district of Porangatu, which became the municipality of Porangatu, now the most important city in the region.
In 1943, the name was changed to Uruaçu, which is derived from Tupi-Guaraní and means "large bird". In 1948, Uruaçu lost a district that became its own municipality, Porangatu, now the most important city in the area.