from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A dark mineral composed of manganese tetroxide, sometimes used as an ore of manganese
from The Century Dictionary and Cyclopedia
- n. Pyramidal manganese ore. It occurs in porphyry, in veins, in Germany and elsewhere.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a mineral consisting of manganese tetroxide; a source of manganese
Named for J. F. L. Hausmann, German mineralogist (Wiktionary)