osmous
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os·mous
(ŏz′məs) also os·mi·ous (-mē-əs)adj.
Relating to or containing osmium in a compound with a valence lower than that in a comparable osmic compound.
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.
osmous
(ˈɒzməs)adj
(Chemistry) of or containing osmium in a low valence state, esp the divalent state. Also: osmious
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014