Lead (chemical element Pb): a soft, heavy metal formerly used in pipes, bullets, and paints; now restricted due to toxicity.
古い家の配管には鉛が使われていることがある。
Old houses sometimes have lead in their plumbing.
この絵の絵の具には鉛が含まれていないか確認した。
I checked whether lead was included in the paint for this painting.
鉛は長期的に体内に蓄積すると健康に害を及ぼす。
Lead accumulates in the body over time and can harm health.