English dictionary

porphyry

/'p/O/rf/@/r/i/

Definitions, examples, synonyms and antonyms from WordNet 3.0.

noun

any igneous rock with crystals embedded in a finer groundmass of minerals

noun.substance

Synonyms porphyritic rock

Source: WordNet 3.0
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.

noun

Source: webster1913