珪素(けいそ)

けいそ
noun
silicon (chemical element)
technicalscience
1. silicon (the chemical element, symbol Si)
The nonmetallic chemical element silicon, abundant in sand and rock and central to semiconductors and glass. Also written ケイ素(けいそ).
珪素(けいそ)は半導体(はんどうたい)の材料(ざいりょう)だ。
Silicon is a material for semiconductors.
地殻(ちかく)には珪素(けいそ)が多(おお)く含(ふく)まれている。
The earth's crust contains a lot of silicon.
珪素(けいそ)は酸素(さんそ)に次(つ)いで地球上(ちきゅうじょう)で二番目(にばんめ)に多(おお)い元素(げんそ)だ。
Silicon is the second most abundant element on Earth after oxygen.

The element silicon (Si). In technical and everyday writing it is often spelled ケイ素(けいそ) with the first character in katakana.

Common collocations

  • 珪素(けいそ)樹脂(じゅし): silicone resin
  • 二酸化(にさんか)珪素(けいそ): silicon dioxide (silica)
  • 珪素(けいそ)鋼(こう): silicon steel

Similar words

  • シリコン: silicon/silicone — the katakana loanword, used especially for the semiconductor material and for silicone products

Related Words

Compare: シリコン (silicon/silicone)
general
Added 2026.7.17 6:18 · Revised 2026.9.2 13:02
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