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orthophyric

American  
[awr-thuh-fahy-rik] / ˌɔr θəˈfaɪ rɪk /

adjective

Petrography.
  1. of or relating to a texture in which the groundmass is characterized by closely packed, short, quadrilateral crystals of feldspar larger than those in a trachytic groundmass.


Etymology

Origin of orthophyric

ortho- + -phyre + -ic