'Porphyritic' definitions:
Definition of 'porphyritic'
(from WordNet)
adjective
(of rocks) consisting of porphyry or containing large crystals in a fine groundmass of minerals
Definition of 'Porphyritic'
From: GCIDE
- 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. [1913 Webster]