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Feldspar
//fɛldspɑɹ// noun
Definitions
Noun
- 1 Any of a large group of rock-forming aluminosilicate minerals containing potassium, sodium, or calcium that, together, make up about 60% of the Earth's outer crust. countable, uncountable
- 2 any of a group of hard crystalline minerals that consist of aluminum silicates of potassium or sodium or calcium or barium wordnet
Etymology
Partial calque of German Feldspat, formed from Feld (“field”) + Spat (“spar”), the second element replaced with the English cognate spar.
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