HyperDic: groundmass

English > 1 sense of the word groundmass:
NOUNsubstancegroundmass(geology) the matrix of fine-grained crystalline material in which larger / larger crystals are embedded
English > groundmass: 1 sense > noun 1, substance
Meaning(geology) the matrix of fine-grained crystalline material in which larger / larger crystals are embedded.
CategorygeologyA science that deals with the history of the earth as recorded in rocks / rocks
Broaderigneous rockrock formed by the solidification of molten magma
Substance ofporphyry, porphyritic rockAny igneous rock with crystals embedded in a finer groundmass of minerals

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