from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. An alternate name for illite.
from the GNU version of the Collaborative International Dictionary of English
- n. A variety of potash mica containing water. It is less elastic than ordinary muscovite.
from The Century Dictionary and Cyclopedia
- n. A variety of potashmica which contains more water than ordinary muscovite, and is less elastic. See mica.
hydro- + mica (Wiktionary)