Plagioclase

2 definitions found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Plagioclase \Pla"gi*o*clase\, n. [Gr. pla`gios oblique + kla^n
     to break.] (Min.)
     A general term used of any triclinic feldspar. See the Note
     under {Feldspar}.
     [1913 Webster]



From WordNet (r) 2.0 [wn]:

  plagioclase
       n : any of a rock-forming series of triclinic feldspars [syn: {oligoclase}]