| actinomycin | (noun) any of various red antibiotics isolated from soil bacteria | - |
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| antimycin | (noun) a crystalline antibiotic active against various fungi | - |
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| azithromycin | (noun) a systemic antibacterial medicine (trade name Zithromax) that is prescribed to treat bacterial infections in many different parts of the body | Synonyms: Zithromax |
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| carbomycin | (noun) a colorless basic antibiotic that inhibits the growth of Gram-positive organisms | - |
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| cephaloglycin | (noun) antibiotic related to cephalosporin but no longer in common use | Synonyms: Kafocin |
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| dihydrostreptomycin | (noun) antibiotic consisting of a hydrogenated form of streptomycin; used against tuberculosis and tularemia and Gram-negative organisms | - |
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| erythromycin | (noun) an antibiotic (trade name Erythrocin or E-Mycin or Ethril or Ilosone or Pediamycin) obtained from the actinomycete Streptomyces erythreus; effective against many Gram-positive bacteria and some Gram-negative | Synonyms: E-Mycin, Erythrocin, Ethril, Ilosone, Pediamycin |
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| kanamycin | (noun) antibiotic (trade name Kantrex) used to treat severe infections | Synonyms: Kantrex |
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| lincomycin | (noun) antibiotic (trade name Lincocin) obtained from a streptomyces bacterium and used in the treatment of certain penicillin-resistant infections | Synonyms: Lincocin |
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| mithramycin | (noun) an antineoplastic drug (trade name Mithracin) used to treat cancer of the testes | Synonyms: Mithracin |
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| mitomycin | (noun) a complex of antibiotic substances obtained from a streptomyces bacterium; one form (trade name Mutamycin) shows promise as an anticancer drug | Synonyms: Mutamycin |
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| mycomycin | (noun) a highly unsaturated antibiotic acid obtained from an actinomycete | - |
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| neomycin | (noun) an antibiotic obtained from an actinomycete and used (as a sulphate under the trade name Neobiotic) as an intestinal antiseptic in surgery | Synonyms: fradicin, Neobiotic |
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| spectinomycin | (noun) an antibiotic used to treat gonorrhea | - |
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| streptomycin | (noun) an antibiotic produced by the actinomycete Streptomyces griseus and used to treat tuberculosis | - |
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| tobramycin | (noun) an antibiotic (trade name Nebcin) that is especially effective against Gram-negative bacteria | Synonyms: Nebcin |
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| vancomycin | (noun) an antibiotic (trade name Vancocin) effective against some bacterial infections | Synonyms: Vancocin |
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| viomycin | (noun) a basic polypeptide antibiotic (trade name Viocin) administered intramuscularly (along with other drugs) in the treatment of tuberculosis | Synonyms: Viocin |
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