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.


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