How to say "silicon" in Japanese

• シリコンCommon
  nounThe common word for silicon, the element Si. Use this in everyday and technical contexts alike, such as discussing materials, semiconductors, or the element itself.
  アルミニウム、マグネシウム、シリコンなどの粉末ふんまつが爆発ばくはつする。↗

  Powders of aluminium, magnesium, silicon, etc. explode.
• ケイ素けいそ
  nounAlso names the element silicon (Si), but it is less common than シリコン. It suits scientific or chemical contexts, such as chemistry discussions or the periodic table, where the element is treated formally.

Both words refer to the element silicon (Si); 「シリコン」 is the common everyday term, while 「ケイ素」 is the less common, more scientific name for the element.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

• シリコンsilicon (Si)
• ケイ素けいそsilicon (Si)