| 1. | 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. |
| 2. | a compound from which water has been abstracted. |
anhydride an·hy·dride (ān-hī'drīd')
n.
A chemical compound formed from another by the removal of water.