from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A mineral of the feldspar group, chiefly KAlSi3O8, used in making glass, porcelain, and enamel.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A common feldspar of igneous, plutonic, and metamorphic rocks, made of potassium aluminum silicate, with the chemical formula KAlSi3O8. Microcline is the main feldspar of granite. The bluish-green variety is called amazonstone, and is sometimes of gem quality. Used in ceramics, ceramic glazes, and as a scouring powder.
from the GNU version of the Collaborative International Dictionary of English
- n. A mineral of the feldspar group, like orthoclase or common feldspar in composition, but triclinic in form.
from The Century Dictionary and Cyclopedia
- n. A feldspar identical in composition with orthoclase, but belonging to the triclinic system.
Greek mīkro-, micro- (from the fact that its cleavage angle is not exactly equal to 90°) + Greek klīnein, to lean; see cline.(American Heritage® Dictionary of the English Language, Fourth Edition)
micro- ("small") + -cline (Wiktionary)