contaminant

Noun

That which contaminates; an impurity; foreign matter.

Japanese Meaning

汚染物質 / 不純物 / 異物

The laboratory detected a contaminant in the water sample that hadn't been present last week.

研究所は先週は見られなかった水の試料から汚染物質を検出しました。

Sense（1）

That which contaminates; an impurity; foreign matter.

Put the lid on the jar to keep contaminants out.

contaminants

（ plural ）