[an-hahy-drahyd, -drid]

noun Chemistry.

a compound formed by removing water from a more complex compound: an oxide of a nonmetal (acid anhydride) or a metal (basic anhydride) that forms an acid or a base, respectively, when united with water.
a compound from which water has been abstracted.

Origin of anhydride

1860–65; anhydr(ous) + -ide Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for anhydride

Historical Examples of anhydride

British Dictionary definitions for anhydride



a compound that has been formed from another compound by dehydration
a compound that forms an acid or base when added to water
Also called: acid anhydride, acyl anhydride any organic compound containing the group -CO.O.CO- formed by removal of one water molecule from two carboxyl groups

Word Origin for anhydride

C19: from anhydr (ous) + -ide
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

anhydride in Medicine




A chemical compound formed from another by the removal of water.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

anhydride in Science



A chemical compound formed from another, especially an acid, by the removal of water.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.