antibiotic an·ti·bi·ot·ic (ān'tĭ-bī-ŏt'ĭk, ān'tī-)
A substance, such as penicillin or streptomycin, produced by or derived from certain fungi, bacteria, and other organisms, that can destroy or inhibit the growth of other microorganisms. adj.
Of or relating to antibiotics.
Of or relating to antibiosis.
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