contaminant
noun
- harmful impurity
Wiktionary
Pronunciation: /kənˈtamɪnənt/
noun
Etymology: Borrowed from French contaminant, present participle of contaminer (“to contaminate”), from Latin contāmināre. By surface analysis, contaminate + -ant.
- That which contaminates; an impurity; foreign matter.
“Put the lid on the jar to keep contaminants out.”