biocide
/ˈbaɪoʊsaɪd/ BY-oh-side
Definitions
1. noun
A substance capable of killing living organisms, especially microorganisms.
“The biocide used in the hospital was effective in eliminating the bacteria.”
2. noun
A substance used to kill pests or unwanted organisms, especially in agriculture or forestry.
“The farmer used a biocide to control the insect infestation on his crops.”