from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Any salt that forms crystals containing water of crystallization only at low temperatures
from the GNU version of the Collaborative International Dictionary of English
- n. A substance, as salt, ammonium chloride, etc., which crystallizes with water of crystallization only at low temperatures, or below the freezing point of water.
from The Century Dictionary and Cyclopedia
- n. A definite mixture of ice and any crystallized salt obtained by freezing a saturated aqueous solution of the salt.
cryo- + hydrate (Wiktionary)