porphyritic

adjective
por·​phy·​rit·​ic | \ˌpȯr-fə-ˈri-tik \

Definition of porphyritic 

1 : of or relating to porphyry

2 : having distinct crystals (as of feldspar) in a relatively fine-grained base

First Known Use of porphyritic

15th century, in the meaning defined at sense 1

History and Etymology for porphyritic

Middle English porphiritike, from Medieval Latin porphyriticus, from Greek porphyritikos, from porphyritēs (lithos) porphyry

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The first known use of porphyritic was in the 15th century

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