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Webster 1828 Edition
Feldspar
FELD'SPAR
,Definition 2024
feldspar
feldspar
English
Alternative forms
Noun
feldspar (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.
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Derived terms
Terms derived from feldspar
Translations
any of a large group of rock-forming minerals