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A semisynthetic penicillin, C17H20N2O6S, formerly used in the form of its sodium salt to treat infections caused by penicillinase-producing staphylococci.
(Pharmacology) a semisynthetic penicillin used to treat various infections
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|Noun||1.||methicillin - antibiotic drug of the penicillin family used in the treatment of certain staphylococcal infections|
penicillin - any of various antibiotics obtained from Penicillium molds (or produced synthetically) and used in the treatment of various infections and diseases