feldspar
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.
Related words
- alkali feldspar
- feldsparlike
- felsic
- glassy feldspar
- K-feldspar
- potash-feldspar
- potassium feldspar
Where this comes from
This definition is adapted from “feldspar” on Wiktionary, by its contributors, published under CC BY-SA 4.0. This page is published under the same licence.