groundmass

English Thesaurus

1. (geology) the matrix of fine-grained crystalline material in which larger crystals are embedded (noun.substance)

hypernym	:	igneous rock,
definition	:	rock formed by the solidification of molten magma (noun.substance)

substance meronym	:	porphyritic rock, porphyry,
definition	:	any igneous rock with crystals embedded in a finer groundmass of minerals (noun.substance)

domain category	:	geology,
definition	:	a science that deals with the history of the earth as recorded in rocks (noun.cognition)