orthophyric

American

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

adjective

Petrography.

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.

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Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023