also: けうげんそ
noun
Chemistry term for an element that is scarce in the Earth's crust; often used in contexts like rare earth elements or trace elements. See also 希元素.
See also: 希元素
この鉱石にはいくつかの稀有元素が含まれている。
This ore contains several rare elements.
稀有元素の抽出には高度な技術が必要だ。
Extracting rare elements requires advanced technology.