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Search results for 'feldspar':

feldspar or felspar noun, geol any of a large group of rock-forming minerals, mainly aluminium silicates, found in most igneous and many metamorphic rocks, eg orthoclase, plagioclase. feldspathic or felspathic adj.
ETYMOLOGY: 18c: from German Feld field + Spat spar.

feldspar or felspar noun, geol any of a large group of rock-forming minerals, mainly aluminium silicates, found in most igneous and many metamorphic rocks, eg orthoclase, plagioclase. feldspathic or felspathic adj.
ETYMOLOGY: 18c: from German Feld field + Spat spar.

feldspar or felspar noun, geol any of a large group of rock-forming minerals, mainly aluminium silicates, found in most igneous and many metamorphic rocks, eg orthoclase, plagioclase. feldspathic or felspathic adj.
ETYMOLOGY: 18c: from German Feld field + Spat spar.