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English Dictionary: porphyritic by the DICT Development Group
2 results for porphyritic
From WordNet (r) 3.0 (2006) [wn]:
  1. (of rocks) consisting of porphyry or containing large crystals in a fine groundmass of minerals
From Webster's Revised Unabridged Dictionary (1913) [web1913]:
   Porphyritic \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.
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