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microcline

Pronunciation: /ˈmʌɪkrə(ʊ)klʌɪn/

Definition of microcline

noun

[mass noun]

a green, pink, or brown crystalline mineral consisting of potassium-rich feldspar, characteristic of granite and pegmatites.

Origin:

mid 19th century: from German Microklin, from Greek mikros 'small' + klinein 'to lean' (because its angle of cleavage differs only slightly from 90 degrees)