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from The Century Dictionary and Cyclopedia

  • n. A trade-name for Canadian asbestos, a variety of chrysotile or fibrous serpentine.
  • n. In petrography, a term proposed by Rosenbuseh (1882) for certain fine-grained igneous rocks of the syenite family, consisting chiefly of alkali feldspars (microcline, mierocline-microperthite, anorthoclase or orthoclase).


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