15th century, in the meaning defined at sense 1
Middle English porphiritike, from Medieval Latin porphyriticus, from Greek porphyritikos, from porphyritēs (lithos) porphyry
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“Porphyritic.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/porphyritic. Accessed 9 Aug. 2022.
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