DISINFECTANT
bactericidal, disinfectant, germicidal
(adjective) preventing infection by inhibiting the growth or action of microorganisms
disinfectant, germicide, antimicrobic, antimicrobial
(noun) an agent (as heat or radiation or a chemical) that destroys microorganisms that might carry disease
Source: WordNet® 3.1
Etymology
Adjective
disinfectant (not comparable)
Serving to kill germs or viruses.
Noun
disinfectant (plural disinfectants)
A substance that kills germs and/or viruses.
Source: Wiktionary
Dis`in*fect"ant, n.
Definition: That which disinfects; an agent for removing the causes of
infection, as chlorine.
Source: Webster’s Unabridged Dictionary 1913 Edition