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porphyry

Pronunciation: /ˈpɔːfɪri/
Definition of porphyry

noun (plural porphyries)

[mass noun]
  • a hard igneous rock containing crystals of feldspar in a fine-grained groundmass.

Origin:

late Middle English: via medieval Latin from Greek porphuritēs, from porphura 'purple'

porphyry in other Oxford dictionaries

Definition of porphyry in the US English dictionary
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