FELSPARS
- FELSPAR, a family of crystalline minerals, also FELDSPAR [n]
- any of a group of minerals, principally aluminosilicates of potassium, sodium, and calcium, characterized by two cleavages at nearly right angles: one of the most important constituents of igneous rocks
- FELSPAR, feldspar (a mineral (a naturally occurring inorganic substance having a characteristic set of physical properties)) [n]