Definition of porphyry
1 : a rock consisting of feldspar crystals embedded in a compact dark red or purple groundmass
2 : an igneous rock of porphyritic texture
Origin and Etymology of porphyry
Middle English porphiri, from Medieval Latin porphyrium, alteration of Latin porphyrites, from Greek porphyritēs (lithos), literally, stone like Tyrian purple, from porphyra purple
First Known Use: 15th century
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