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.
[1913 Webster]