[ per-as-id ]
/ pərˈæs ɪd /

noun Chemistry.

an oxyacid, the primary element of which is in its highest possible oxidation state, as perchloric acid, HClO4, and permanganic acid, HMnO4.

Origin of peracid

First recorded in 1895–1900; per- + acid Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for peracid


/ (pɜːrˈæsɪd) /


an acid, such as perchloric acid, in which the element forming the acid radical exhibits its highest valency
(not in technical usage) an acid, such as persulphuric acid, that contains the -OOH groupRecommended names: peroxo acid, peroxy acid

Derived Forms

peracidity (ˌpɛrəˈsɪdɪtɪ), noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medicine definitions for peracid


[ pûrăs′ĭd ]


Any of various acids containing the peroxy group.
An inorganic acid, such as perchloric acid, containing the largest proportion of oxygen in a series of related acids.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.