ALL meanings of feldspar
feld·spar
F f - noun feldspar 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. 1
- noun feldspar An abundant rock-forming mineral typically occurring as colorless or pale-colored crystals and consisting of aluminosilicates of potassium, sodium, and calcium. 1
- noun feldspar any of a group of hard rock-forming minerals consisting of aluminium silicates of potassium, sodium, calcium, or barium: the principal constituents of igneous rocks. The group includes orthoclase, microcline, and the plagioclase minerals 0
- noun feldspar any of several light-colored, hard, glassy, monoclinic or triclinic minerals made up of aluminum silicates with sodium, potassium, or calcium, found in all types of rock 0