noun Pharmacology.

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

Origin of methicillin

First recorded in 1960–65; meth(yl) + (pen)icillin Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for methicillin

Contemporary Examples of methicillin

British Dictionary definitions for methicillin



a semisynthetic penicillin used to treat various infections
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

methicillin in Medicine




A synthetic antibiotic related to penicillin and most commonly used in treatment of infections caused by staphylococci that produce beta-lactamase.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.