Porphyritic

[,pɒ:fi'ritik]

Definition

(adj.) (of rocks) consisting of porphyry or containing large crystals in a fine groundmass of minerals .

Typist: Wesley--From WordNet

Definition

(a.) 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.

Edited by Greg