feldspar
English
Alternative forms
Etymology
A partial calque of German Feldspat, formed from Feld (“field”) + Spat (“spar”).
Noun
feldspar (countable and uncountable, plural feldspars)
- (mineralogy) Any of a large group of rock-forming minerals that, together, make up about 60% of the earth's outer crust. The feldspars are all aluminum silicates of the alkali metals sodium, potassium, calcium and barium. Feldspars are the principal constituents of igneous and plutonic rocks.
Derived terms
Related terms
Translations
any of a large group of rock-forming minerals
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