Roosevelt, Rio. The American Heritage® Dictionary of the English Language: Fourth Edition. 2000.

The American Heritage^® Dictionary of the English Language: Fourth Edition. 2000.

Roosevelt, Rio

	A river, about 644 km (400 mi) long, of northwestern Brazil. Originally known as the River of Doubt, it was renamed in honor of Theodore Roosevelt, who explored it in 1913.


The American Heritage^® Dictionary of the English Language, Fourth Edition. Copyright © 2000 by Houghton Mifflin Company. Published by the Houghton Mifflin Company. All rights reserved.