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Definition of Amazon River

World Factbook

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Houghton Mifflin

Amazon River

The second-longest river in the world and the one with the greatest volume of water, flowing about 6,275 km (3,900 mi) from northern Peru across northern Brazil to a wide delta on the Atlantic Ocean. The first European to explore it was probably the Spanish navigator Vicente Yáñez Pinzón in 1500.

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