Definition of methicillin
: a semisynthetic penicillin C17H19N2O6NaS used especially in the form of its sodium salt against beta-lactamase-producing staphylococci
Origin of methicillin
meth- + penicillin
First Known Use: 1961
Medical Definition of methicillin
: a semisynthetic penicillin C17H19N2O6NaS that is especially effective against beta-lactamase producing staphylococci
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Medical Dictionary: Definition of "methicillin"
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