methicillin

noun Pharmacology.

1. a semisynthetic penicillin antibiotic, C17H19N2NaO6S, used principally in the treatment of severe, penicillin-resistant staphylococci infections.

noun

1. a semisynthetic penicillin used to treat various infections

n.

1. A synthetic antibiotic related to penicillin and most commonly used in treatment of infections caused by staphylococci that produce beta-lactamase.