English Dictionary

feldspar

名詞

可算名詞 不可算名詞

(mineralogy) Any of a large group of rock-forming minerals that, together, make up about 60% of the earth's outer crust. The feldspars are all aluminum silicates of the alkali metals sodium, potassium, calcium and barium. Feldspars are the principal constituents of igneous and plutonic rocks.

日本語の意味

長石：地殻の約60%を構成する多くの岩石形成鉱物の総称。アルカリ金属のアルミニウムシリケートであり、火成岩や深成岩の主要成分となる鉱物群。

The geologist identified feldspar and quartz in the hand sample before describing the rock's history.

地質学者は、試料を手に取って長石と石英を同定し、その岩石の成因を記述した。

意味（1）

(mineralogy) Any of a large group of rock-forming minerals that, together, make up about 60% of the earth's outer crust. The feldspars are all aluminum silicates of the alkali metals sodium, potassium, calcium and barium. Feldspars are the principal constituents of igneous and plutonic rocks.

feldspars （ plural ）