from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. iron pyrite or arsenic pyrite
from the GNU version of the Collaborative International Dictionary of English
- n. Iron pyrites, or arsenical pyrites; -- so called by the Cornish miners.
from The Century Dictionary and Cyclopedia
- n. Iron pyrites, either pyrite or marcasite, and including also arsenical pyrites, or arsenopyrite, which is sometimes called arsenical mundic.
Sorry, no etymologies found.