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porphyritic
CIDE DICTIONARY
porphyritic, a. [Cf. F. porphyritique.].
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. [1913 Webster]
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