anhydride

[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

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for anhydride

Historical Examples of anhydride

Antimonic or metantimonic acid, heated to a temperature below redness, loses water and yields the anhydride, Sb2O5.
Cooley's Cyclopdia of Practical Receipts and Collateral Information in the Arts, Manufactures, Professions, and Trades..., Sixth Edition, Volume I
Arnold Cooley
As Arsenious anhydride:—Obtained in a weighed capsule or tube, either by the crystallisation or sublimation test.
Cooley's Cyclopdia of Practical Receipts and Collateral Information in the Arts, Manufactures, Professions, and Trades..., Sixth Edition, Volume I
Arnold Cooley
Nitric peroxide, Peroxide of nitrogen, Nitrogen tetroxide, Hyponitric anhydride.
Cooley's Practical Receipts, Volume II
Arnold Cooley
Like sulphur, selenium combines with oxygen and forms an anhydride corresponding to sulphurous anhydride.
Cooley's Practical Receipts, Volume II
Arnold Cooley
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

British Dictionary definitions for anhydride

anhydride

noun

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

anhydride

[ăn-hī′drīd′]

A chemical compound formed from another by the removal of water.

anhydride in Science

anhydride

[ăn-hī′drīd′]

A chemical compound formed from another, especially an acid, by the removal of water.