Definition of porphyroblastic in English:

porphyroblastic

adjective

Geology
  • See porphyroblast

    • ‘The earliest porphyroblastic fabric is not restricted to the immediate metapluton surroundings.’
    • ‘Strongly foliated porphyroblastic politic gneiss forms a selvedge up to 100 m thick in sharp (but in some cases ductile) contact with peridotite on the northern margin of the Carratraca massif.’

Pronunciation

porphyroblastic

/pɔːfɪrə(ʊ)ˈblastɪk/