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noun
Any of a series of triclinic feldspars that form rocks.
synonym: oligoclase.
is a specific kind of: feldspar, felspar.
is a broader term that covers: albite, white feldspar | anorthite.
is contained in: dacite | basalt.
derivation: plagioclastic.
Polish: oligoklaz
Find more on plagioclase elsewhere: etymology - rhymes - Wikipedia.
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