from The Century Dictionary.
- noun A lead-gray to steel-gray mineral which occurs very sparingly in highly modified monoclinic crystals in the dolomite of the Binnenthal in Switzerland: the chemical composition has not been determined.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun mineralogy A monoclinic-prismatic
mineralcontaining arsenic, lead, silver, and sulfur.
from Wiktionary, Creative Commons Attribution/Share-Alike License
Sorry, no example sentences found.