feldspar

English

Alternative forms

Etymology

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

Pronunciation

  • US: IPA(key): /fɛldspɑɹ/
  • UK: IPA(key): /ˈfɛldspɑː/
  • Audio (Southern England):(file)

Noun

feldspar (countable and uncountable, plural feldspars)

  1. (mineralogy) 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.

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