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Meaning of microcline

mi•cro•cline

Pronunciation: (mī'kru-klīn"), [key]
— n.
  1. a mineral of the feldspar group, potassium aluminum silicate, KAlSiO, identical in composition with orthoclase but having triclinic instead of monoclinic crystals, used in making porcelain.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.