Of or pertaining to pornography; lascivious; licentious; as, pornographic writing
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
(of rocks) consisting of porphyry or containing large crystals in a fine groundmass of minerals