Bible Dictionaries
Porphyritic

Webster's Dictionary

(a.) Relating to, or resembling, porphyry, that is, characterized by the presence of distinct crystals, as of feldspar, quartz, or augite, in a relatively fine-grained base, often aphanitic or cryptocrystalline.

Bibliography Information
Webster, Noah. Entry for 'Porphyritic'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​p/porphyritic.html. 1828.