orthophyric

[awr-thuh-fahy-rik]
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.

Origin of orthophyric

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018