PORPHYRITIC

porphyritic|porphyraceous. Porphyritic, or Porphyraceous, a. pertaining to or like porphyry

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Por′phy‐rit″ic (?), a. [[Cf. F. porphyritique.]] (Min.) 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.