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A river of northwest South Dakota flowing about 400 km (250 mi) eastward to the Missouri River.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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|Noun||1.||Moreau River - a river that rises in western South Dakota and flows eastward to the Missouri River|
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