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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.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
(Pharmacology) a semisynthetic penicillin used to treat various infections
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
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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
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