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from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A rare sodium amphibole mineral.

from The Century Dictionary and Cyclopedia

  • n. A mineral related to hornblende, composed of silicates of iron and soda with a little alumina and lime.


Named for Swedish chemist Johan August Arfwedson (1792-1841) (Wiktionary)


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