from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A saline evaporite, consisting of a mixed sodium and calcium sulphate, with the chemical formula Na2Ca(SO4)2.
from the GNU version of the Collaborative International Dictionary of English
- n. A mineral, consisting of the sulphates of soda and lime.
from The Century Dictionary and Cyclopedia
- n. A mineral of a grayish-white or yellowish color, a compound of the sulphates of sodium and calcium, occurring in very flat oblique rhombic prisms. It is found chiefly in rock-salt.
Sorry, no etymologies found.