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[an-hahy-drahyd, -drid] /ænˈhaɪ draɪd, -drɪd/
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; anhydrous + -ide Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for anhydride
  • Definition: o-xylene is an aromatic hydrocarbon, used in the production of phthalic anhydride.
British Dictionary definitions for anhydride


/ænˈhaɪdraɪd; -drɪd/
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
C19: from anhydr(ous) + -ide
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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anhydride in Medicine

anhydride an·hy·dride (ān-hī'drīd')
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.
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anhydride in Science
A chemical compound formed from another, especially an acid, by the removal of water.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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