An oxide that can combine with water to form an acid or that is derived from an acid by the abstraction of water.
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an·hy·dride (')an-'hī-.drīd n a compound derived from another (as an acid) by removal of the elements of water
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an·hy·dride (an-hiґdrīd) [an-1 + hydride] a chemical compound derived from a substance, especially an acid, by the abstraction of a molecule of water. The anhydrides of bases are oxides; those of alcohols are ethers.Medical dictionary. 2011.