• Definition for "groundmass"
    • The fine-grained crystalline base of porphyritic rock which…
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  • Sentence for "groundmass"
    • The rock here is a porphyritic…
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  • Hypernym for "groundmass"

groundmass definition

  • noun:
    • The fine-grained crystalline base of porphyritic rock which larger crystals tend to be embedded.
    • The matrix of fine-grained crystalline product in which bigger crystals tend to be embedded.
    • (geology) the matrix of fine-grained crystalline material in which bigger crystals are embedded
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