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A river of eastern Peru and northwest Brazil flowing about 1,930 km (1,200 mi) northeast to the Amazon River.
(Placename) a river in South America, rising in E central Peru and flowing northeast across NW Brazil to join the Amazon. Length: 1900 km (1200 miles)
a river in E and W South America, flowing NE from E Peru through W Brazil to the Amazon. 1200 mi. (1930 km) long.