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  1. Oxford American Dictionary

    porphyroblast

    • IPA[ˈpôrfərōˌblast]

    美式

    • n.
      a larger recrystallized grain occurring in a finer groundmass in a metamorphic rock.

    • noun: porphyroblast, plural noun: porphyroblasts

    • 更多解釋

    porphyroblast

    • IPA[ˈpɔːfɪrə(ʊ)blɑːst]

    英式

    • n.
      a larger recrystallized grain occurring in a finer groundmass in a metamorphic rock.

    Oxford Dictionary