(n.) Any agent detrimental to, or destructive of, the life of microbes or bacterial organisms.

Chloromycetin Terramycin acaricide actinomycin alexipharmic amphotericin antacid anthelmintic antidotal antimicrobial antipyretic antiseptic antitoxic bacitracin bacteriostatic bug bomb carbamate insecticide carbomycin chemosterilant chlorinated hydrocarbon insecticide chlortetracycline cloxacillin contact poison defoliant dihydrostreptomycin disinfectant eradicant erythromycin febrifugal fradicin fumigant fungicide germicide gramicidin griseofulvin herbicide insect powder insecticide methicillin microbicide miticide mitomycin organic chlorine organic phosphate insecticide penicillin pesticide poison rat poison roach paste roach powder rodenticide stomach poison streptomycin streptothricin subtilin sulfa systemic systemic insecticide tetracycline toxic toxicant toxin tylocin tyrothricin vancomycin venin venom vermicide viomycin virus weed killer