Emily Dickinson Lexicon

MI'CA, n. [L. 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. Nicholson. Encyc. Jameson subdivides mica into ten subspecies, viz. mica, pinite, lepidolite, chlorite, green earth, talck, nacrite, pot-stone, steatite and figure-stone. It its component part of granite. Ure.