Dictionary![]() ![]() A•murPronunciation: (ä-moor'; Russ. u-mOOr'), [key] —n. a river in E Asia, forming most of the boundary between N Manchuria and the SE Russian Federation, flowing into the Sea of Okhotsk. ab. 2700 mi. (4350 km) long. Chinese, Heilong Jiang. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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