from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A monoclinic-domatic mineral containing aluminum, hydrogen, oxygen, and silicon.
from the GNU version of the Collaborative International Dictionary of English
- n. A claylike mineral, occurring in soft, smooth, amorphous masses, of a whitish color.
from The Century Dictionary and Cyclopedia
- n. A clay-like, earthy mineral with waxy or dull luster, white or slightly colored, and having a conchoidal fracture. It is a hydrous silicate of aluminium.