from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A colorless, white, gray, blue, or lilac mineral of anhydrous calcium sulfate, CaSO4, occurring as layers in gypsum deposits.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A saline evaporite consisting of anhydrous calcium sulfate (gypsum).
from the GNU version of the Collaborative International Dictionary of English
- n. A mineral of a white or a slightly bluish color, usually massive. It is anhydrous sulphate of lime, and differs from gypsum in not containing water (whence the name).
from The Century Dictionary and Cyclopedia
- n. Anhydrous sulphate of calcium.
anhydr(ous) + -ite1.(American Heritage® Dictionary of the English Language, Fourth Edition)