| amphotericin | (noun) an antibiotic and antifungal agent | - |
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| capsaicin | (noun) colorless pungent crystalline compound derived from capsicum; source of the hotness of hot peppers of the genus Capsicum such as chili and cayenne and jalapeno | - |
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| doxorubicin | (noun) an antibiotic used as an anticancer drug | - |
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| fradicin | (noun) an antibiotic obtained from an actinomycete and used (as a sulphate under the trade name Neobiotic) as an intestinal antiseptic in surgery | Synonyms: Neobiotic, neomycin |
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| gentamicin | (noun) an antibiotic (trade name Garamycin) that is derived from an actinomycete; used in treating infections of the urinary tract | Synonyms: Garamycin |
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| ricin | (noun) a toxic protein extracted from castor beans; used as a chemical reagent; can be used as a bioweapon | Synonyms: ricin toxin |
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| salicin | (noun) an anti-inflammatory agent that is produced from willow bark. | - |
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| streptothricin | (noun) a basic antibiotic derived from a soil actinomycete | - |
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| tyrothricin | (noun) a mixture of antibiotics applied locally to infections caused by Gram-positive bacteria | - |
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