希き土ど類るい元げん素そ

noun

rare-earth element; rare-earth metal

Chemistry term for the lanthanide series plus scandium and yttrium.

• 希き土ど類るい元げん素そはハイテク製せい品ひんに不ふ可か欠けつだ。

  Rare-earth elements are essential for high-tech products.

• ネオジムは希き