feldspar

n. 长石
【化】 长石
【医】 长石

异体字:felspar 

feld.spar

n.（名词）
Any of a group of abundant rock-forming minerals occurring principally in igneous, plutonic, and some metamorphic rocks, and consisting of silicates of aluminum with potassium, sodium, calcium, and, rarely, barium. About '0 percent of the earth`s outer crust is composed of feldspar.
长石：任何一组由大量岩石形成的矿物，主要存在于火成岩、深成岩以及一些变性的岩石中，含有钾、钠、钙及极少的钡的铝硅酸盐，地球的外层地壳中约百分之六十是长石

来源：
Partial translation of obsolete German Feldspath
已废德语 Feldspath的部分翻译
Feld [field] from Middle High German veld from Old High German feld * see pel…- 2
Feld [（矿物）产地] 源自 中古高地德语 veld 源自 古高地德语 feld *参见 pel…- 2
Spath [spar]
Spath [晶石]