Feldspar

//fɛldspɑɹ// noun

Definitions

Noun
  1. 1
    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. countable, uncountable
  2. 2
    any of a group of hard crystalline minerals that consist of aluminum silicates of potassium or sodium or calcium or barium wordnet

Etymology

Partial calque of German Feldspat, formed from Feld (“field”) + Spat (“spar”), the second element replaced with the English cognate spar.

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