Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio.
river in central Brazil, flowing north into the Tocantins: c. 1,300 mi (2,092 km)
Used by arrangement with John Wiley & Sons, Inc.
The American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
A river rising in central Brazil and flowing about 2,092 km (1,300 mi) generally northward to the Tocantins River. There are numerous falls on the river.