Ucayali

(o̵̅o̅′kä yä)

river in E Peru, flowing north to join the Marañón & form the Amazon: c. 1,200 mi (1,931 km)

See Ucayali in American Heritage Dictionary 4

A river of eastern Peru flowing about 1,609 km (1,000 mi) northward to join the Marañón River and form the Amazon River.
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