The chemical element arsenic, atomic number 33. Often discussed in contexts of toxicity, poisoning, or semiconductor use.
Arsenic is known as a deadly poison.
Trace amounts of arsenic were detected in this well water.
Standard spelling for the chemical element arsenic.
Rare variant kanji form; ヒ素 is overwhelmingly preferred.
The kanji 素 means 'element', and ヒ is a phonetic ateji for 'arsenic'. The reading ひそ is derived from the Dutch 'arseen' or possibly German 'Arsen'.