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Dictionary » P » Porphyritic Porphyriticporphyritic (Science: chemical) Relating to, or resembling, porphyry, that is, characterised by the presence of distinct crystals, as of feldspar, quartz, or augite, in a relatively fine-grained base, often aphanitic or cryptocrystalline. Origin: Cf. F. Porphyritique.
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