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1. also Northern Dvina A river, about 750 km (465 mi) long, of northwest Russia flowing northwest into Dvina Bay, an arm of the White Sea.
2. also Western Dvina A river, about 1,020 km (635 mi) long, rising in western Russia and flowing southwest and northwest through Belarus and Latvia to the Gulf of Riga.
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.
1. (Placename) Northern Dvina a river in NW Russia, formed by the confluence of the Sukhona and Yug Rivers and flowing northwest to Dvina Bay in the White Sea. Length: 750 km (466 miles). Russian name: Severnaya Dvina
2. (Placename) Western Dvina a river rising in W Russia, in the Valdai Hills and flowing south and southwest then northwest to the Gulf of Riga. Length: 1021 km (634 miles). Russian name: Zapadnaya Dvina Latvian name: Daugava
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
1. Also called Western Dvina. Latvian, Daugava. a river rising in the Valdai Hills in the W Russian Federation, flowing W through Belorussia and Latvia to the Baltic Sea at Riga. ab. 640 mi. (1030 km) long.
2. Also called Northern Dvina. a river in the N Russian Federation in Europe, flowing NW into the White Sea. ab. 470 mi. (750 km) long.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.