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Noun: groundmass  'grawnd,mas
  1. (geology) the matrix of fine-grained crystalline material in which larger crystals are embedded

Derived forms: groundmasses

Type of: igneous rock

Part of: porphyritic rock, porphyry

Encyclopedia: Groundmass

Nearest

ground-floor
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Groundhog Day
ground-hugging
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groundmass
groundnut
groundnut oil
groundnut vine
grounds
groundsel
groundsel bush
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