suboxide
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sub·ox·ide
(sŭb-ŏk′sīd′)n.
An oxide containing a relatively small amount of oxygen.
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.
suboxide
(sʌbˈɒksaɪd)n
(Chemistry) an oxide of an element containing less oxygen than the common oxide formed by the element: carbon suboxide, C2O3.
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
sub•ox•ide
(sʌbˈɒk saɪd, -sɪd)n.
the oxide of an element that contains the smallest proportion of oxygen.
[1795–1805]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.