Definition of porphyraceous in English:

porphyraceous

adjective

Geology
rare
  • Porphyritic.

Origin

Late 18th century; earliest use found in Richard Kirwan (1733–1812), chemist and mineralogist. From porphyr- + -aceous, perhaps after a German model.

Pronunciation

porphyraceous

/ˌpɔːfɪˈreɪʃəs/