English dictionary
porphyritic
Definitions, examples, synonyms and antonyms from WordNet 3.0.
adjective
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(of rocks) consisting of porphyry or containing large crystals in a fine groundmass of minerals
Source: WordNet 3.0
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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.
Source: webster1913