oligoclase Meaning, Definition & Usage

  1. noun any of a series of triclinic feldspars that form rocks
    plagioclase.

WordNet

Ol"i*go*clase noun
Etymology
Oligo- + Gr. fracture, fr. to break.
Definitions
  1. (Min.) A triclinic soda-lime feldspar. See Feldspar.

Webster 1913