- 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
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for anhydride
Antimonic or metantimonic acid, heated to a temperature below redness, loses water and yields the anhydride, Sb2O5.
As Arsenious anhydride:—Obtained in a weighed capsule or tube, either by the crystallisation or sublimation test.
Nitric peroxide, Peroxide of nitrogen, Nitrogen tetroxide, Hyponitric anhydride.
Like sulphur, selenium combines with oxygen and forms an anhydride corresponding to sulphurous anhydride.
The constituents of rosin are chiefly (80-90%) abietic acid or its anhydride together with pinic and sylvic acids.Soap-Making Manual
E. G. Thomssen
- 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
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
- 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.
- 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.