bactericidal
adjective
bac·te·ri·cid·al bak-ˌtir-ə-ˈsī-dᵊl 
variants or less commonly bacteriocidal
bak-ˌtir-ē-ə-ˈsī-dᵊl
: destroying bacteria
bactericide
bak-ˈtir-ə-ˌsīd
noun or less commonly bacteriocide
bak-ˈtir-ē-ə-ˌsīd
Example Sentences
Recent Examples on the Web Benzoyl peroxide is a topical bactericidal agent that’s found in many over-the-counter and prescription acne medications. 
Kaitlyn Pirie, Good Housekeeping, 28 Oct. 2021
Kaitlyn Pirie, Good Housekeeping, 28 Oct. 2021 Word History
First Known Use
1877, in the meaning defined above
Medical Definition
bactericidal
adjective
bac·te·ri·cid·al bak-ˌtir-ə-ˈsīd-ᵊl
variants also bacteriocidal
-ˌtir-ē-ə-ˈsīd-
: destroying bacteria