The Collaborative International Dictionary
Cryohydrate
Cryohydrate \Cry`o*hy"drate\ (kr?`?-h?"dr?t), n. [Gr. kry`os cold + E. hydrate.] (Chem.) A substance, as salt, ammonium chloride, etc., which crystallizes with water of crystallization only at low temperatures, or below the freezing point of water. -- F. Guthrie.
Wiktionary
cryohydrate
n. (context chemistry English) Any salt that forms crystals containing water of crystallization only at low temperatures