1. capable of killing infectious agents or of preventing them from spreading.
2. a substance that counteracts infection; see also antimicrobial agent.
antiinfective/an·ti·in·fec·tive/ (-in-fek´tiv) counteracting infection, or an agent that does this.
Etymology: Gk, anti + L, inficere, to stain
1 pertaining to an agent that prevents or treats infection.
2 an antiinfective drug.