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Definition of MICROCLINE
: a triclinic mineral of the feldspar group that is like orthoclase in composition
Origin of MICROCLINE
German Mikroklin, from mikr- micr- + Greek klinein to lean — more at lean
First Known Use: 1849
Common feldspar mineral, one form of potassium aluminosilicate (KAlSiO) that occurs in many rock types. Green specimens are called amazonstone and may be used as gems. It is an end-member composition in the alkali feldspar series. See alsoorthoclase.