from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A chemical compound formed from another, often an acid, by the removal of water.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. any compound formally derived from another (or from others) by the loss of a water molecule, especially acid anhydrides

from the GNU version of the Collaborative International Dictionary of English

  • n. An oxide of a nonmetallic body or an organic radical, capable of forming an acid by uniting with the elements of water; -- so called because it may be formed from an acid by the abstraction of water.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. a compound formed from one or more other compounds in a reaction resulting in removal of water


from The American Heritage® Dictionary of the English Language, 4th Edition

anhydr(ous) + -ide.

from Wiktionary, Creative Commons Attribution/Share-Alike License

an- +‎ hydride


  • I saw a chest full of mixed potassic chlorate and black oxide of manganese, with an apparatus for heating it, and producing oxygen -- a foolish thing, for additional oxygen could not alter the quantity of breathed carbonic anhydride, which is a direct narcotic poison.

    The Purple Cloud

  • ~ To understand the reaction which occurs, it must be remembered that a volatile acid anhydride is expelled from its salts when heated with an anhydride which is not volatile.

    An Elementary Study of Chemistry

  • My most ambitious attempt was a multistep sequence aimed at synthesizing aspirin, for which I needed acetic anhydride, which had to be made from acetyl chloride, for which I needed phosphorus trichloride, for which I needed to burn red phosphorus in a stream of chlorine gas.

    Roger Y. Tsien - Autobiography

  • Alar is manufactured by mixing succinic anhydride with 1,1,dimethylhydrazine UDMH, a toxic component of rocket fuel.

    Wendy Gordon: The True Alar Story

  • "The significant current increase in demand for maleic anhydride and projected long-term global customer requirements necessitated the expansion and will strengthen our advantage as leading producer of this important chemical in Europe," said Sasol-Huntsman managing director

    ANC Daily News Briefing

  • The segment -- which serves customers in the chemical, paint and adhesives industries -- produces and supplies acetyl products such as acetic acid, vinyl acetate monomer, acetic anhydride and other acetyl derivatives.

    Celanese Raises Full-Year Forecast

  • The most acid rain recorded was in Glasgow, Scotland; the reported value (representing an average of several individual samples) was 109.16 grains of sulfuric anhydride per gallon of rainwater.

    Smith, Robert Angus

  • When sulfuric anhydride (SO3) is dissolved in water, each mole of SO3 becomes a mole of sulfuric acid, H2SO4.

    Smith, Robert Angus

  • The conversion of the mixed anhydride into an amide by reacting the anhydride with the nitrogenous base, such as an amino compound, can be carried out at room temperature or below.

    L.S.D., R.I.P.

  • The mixed anhydride of lysergic and trifluoroacetic acids is relatively unstable, especially at room temperature and above, and must be stored at a low temperature.

    L.S.D., R.I.P.


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