from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. An orthorhombic-dipyramidal mineral containing aluminum, hydrogen, manganese, oxygen, and phosphorus.
from the GNU version of the Collaborative International Dictionary of English
- n. A hydrous phosphate of alumina and manganese. It is generally of a rose-pink color, -- whence the name.
from The Century Dictionary and Cyclopedia
- n. A hydrous phosphate of aluminium and manganese, with a small amount of iron.