from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A hydrated basic ferric arsenate, consisting of the elements arsenic, iron, hydrogen, potassium, sodium and oxygen.
from the GNU version of the Collaborative International Dictionary of English
- n. A hydrous arsenate of iron occurring in green or yellowish green cubic crystals; cube ore.
from The Century Dictionary and Cyclopedia
- n. A hydrous arseniate of iron: same as cube-ore.
Greek farmakon, poison (i.e. arsenic), and sideros, iron. (Wiktionary)