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feldspar

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feldspar

Main Entry:: feld·spar
Pronunciation:: \ˈfel(d)-ˌspär\
Function:: noun
Etymology:: modification of obsolete German Feldspath (now Feldspat), from German Feld field + obsolete German Spath (now Spat) spar
Date:: 1772

: any of a group of crystalline minerals that consist of aluminum silicates with either potassium, sodium, calcium, or barium and that are an essential constituent of nearly all crystalline rocks

Learn more about "feldspar" and related topics at Britannica.com

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