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1. Any of various acids containing the peroxy group.
2. An inorganic acid, such as perchloric acid, containing the largest proportion of oxygen in a series of related oxyacids.
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. (Elements & Compounds) an acid, such as perchloric acid, in which the element forming the acid radical exhibits its highest valency
2. (Elements & Compounds) (not in technical usage) an acid, such as persulphuric acid, that contains the -OOH group. Recommended names: peroxo acid or peroxy acid
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
an oxyacid, the primary element of which is in its highest possible oxidation state, as perchloric acid, HClO4, and permanganic acid, HMnO4.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.