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an·ti·bac·te·ri·al .ant-i-bak-'tir-ē-əl, .an-.tī- adj directed or effective against bacteria
antibacterial n an antibacterial agent
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adj.
describing an antibiotic that is active against bacteria.
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an·ti·bac·te·ri·al (an″te-) (an″ti-bak-tērґe-əl) 1. destroying or suppressing the growth or reproduction of bacteria. Cf. bactericidal and bacteriostatic. 2. a substance that destroys or suppresses the growth or reproduction of bacteria.Medical dictionary. 2011.