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Containing the bivalent group O2: peroxyacetyl nitrate.
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.
peroxy-or esp for inorganic compounds
(Elements & Compounds) indicating the presence of the peroxide group, -O–O-: peroxysulphuric acid. Also (not in technical usage): per-
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
a combining form used in the names of chemical compounds in which the bivalent group –O2– is present.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.