Periclase meaning

pĕrĭ-klās, -klāz
A mineral form of magnesium oxide, MgO, usually occurring in cubic crystals or grains.
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(mineralogy) A cubic crystalline form of magnesium oxide (MgO)
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Origin of periclase

  • German Periklas Greek peri- intensive pref. peri– Greek klasis breaking (from its perfect cleavage) orthoclase

    From American Heritage Dictionary of the English Language, 5th Edition