Plagioclase

n.

1.

(Min.) A general term used of any triclinic feldspar. See the Note under Feldspar.

Noun

1.

plagioclase - any of a rock-forming series of triclinic feldspars Synonyms: oligoclase

albite, anorthite, basalt, dacite, feldspar, felspar, oligoclase, white feldspar