Thesaurus: porphyry

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Definitions

1. n. A term used somewhat loosely to designate a rock consisting of a fine-grained base (usually feldspathic) through which crystals, as of feldspar or quartz, are disseminated. There are red, purple, and green varieties, which are highly esteemed as marbles.
2. n. any igneous rock with crystals embedded in a finer groundmass of minerals
3. A term used somewhat loosely to designate a rock consisting of a fine-grained base (usually feldspathic) through which crystals, as of feldspar or quartz, are disseminated. There are red, purple, and green varieties, which are highly esteemed as marbles. Porphyry shell (Zoöl.), a handsome marine gastropod shell (Oliva porphyria), having a dark red or brown polished surface, marked with light spots, like porphyry.
4. A term used somewhat loosely to designate a rock consisting ofa fine-grained base (usually feldspathic) through which crystals, asof feldspar or quartz, are disseminated. There are red, purple, andgreen varieties, which are highly esteemed as marbles. Porphyry shell(Zoöl.), a handsome marine gastropod shell (Oliva porphyria), havinga dark red or brown polished surface, marked with light spots, likeporphyry.
5. n. any igneous rock with crystals embedded in a finer groundmass of minerals