Feldspat
- A variant spelling of 'feldspar', which refers to a group of rock-forming minerals that make up a significant portion of the Earth's crust. Feldspars are typically white or nearly white, though they may be clear or light shades of orange or buff. They are important in the formation of many types of rocks. nounThe granite sample contained a high percentage of feldspat, giving it a distinctive texture.Feldspat is commonly used in the manufacture of ceramics and glass.