| porphyritic | <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. Source: Websters Dictionary (01 Mar 1998) |
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| porphyritic | (of rocks) consisting of porphyry or containing large crystals in a fine groundmass of minerals |
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| porphyritic | any igneous rock with crystals embedded in a finer groundmass of minerals |
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