1. Plural of microcline; a common potassium feldspar mineral that is triclinic in crystal structure and often displays a distinctive grid-like pattern of striations.
Usage: mineralogy; geology; technical

Examples

• Microclines are frequently found in granitic rocks and pegmatites.
• The geologist identified several microclines in the thin section under the microscope.
• Amazonite, a blue-green variety of microcline, is prized by collectors and jewelers.
• Microclines exhibit characteristic cross-hatched twinning patterns that distinguish them from other feldspars.
• The composition of microclines makes them important indicators in metamorphic rock classification.