Meaning of dihydrate

di•hy•drate

Pronunciation: (dī-hī'drāt), [key]
— n. Chem.
  1. a hydrate that contains two molecules of water, as potassium sulfite, KSO&multiplydot;2HO.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.