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 ]
n. [ Myo- + haematin. ] (Physiol.) A red-colored respiratory pigment found associated with hemoglobin in the muscle tissue of a large number of animals, both vertebrate and invertebrate. [ 1913 Webster ]