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from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A mineral deposit that has developed during metamorphism without developing crystalline faces.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A crystal forming in a metamorphic rock that has not developed its characteristic crystalline faces and which gets its shape from bordering crystals.


xeno- + -blast (Wiktionary)


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