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American Dictionary of the English Language

Webster's Dictionary 1828

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Mica


MI'CA, noun [Latin mica a grain or particle; mico, to shine.] A mineral of a foliated structure, consisting of thin flexible lamels or scales, having a shining surface. The scales are sometimes parallel, sometimes interwoven, sometimes wavy or undulated, sometimes representing filaments. It is called also talck, glimmer, muscovy-glass, and glist.

Jameson subdivides mica into ten subspecies, viz. mica pinite, lepidolite, chlorite, green earth, talck, nacrite, potstone, steatite and figure stone.