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from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Describing minerals that contain pentavalent arsenic

from The Century Dictionary and Cyclopedia

  • n. One of a party in the Greek Church, in the thirteenth century, named from its leader Arsenius, patriarch of Constantinople, who excommunicated the emperor Michael Pal├Žologus for putting out the eyes of John Lascaris, a minor and heir to the throne.


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