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[ri-fam-pin] /rɪˈfæm pɪn/
noun, Pharmacology
a semisynthetic broad-spectrum antibiotic, C 4 3 H 5 8 N 4 O 1 2 , used in the treatment of pulmonary tuberculosis, asymptomatic carriers of meningococcal disease, and leprosy.
Origin of rifampin
1965-70; probably rifam(yci)n (orig., rifomycin, equivalent to rifo- (perhaps < Italian rifo(rmare) to reform) + -mycin) + pi(perazine) Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for rifampin
  • If the antibiotic is not working and the health care provider suspects antibiotic resistance, vancomycin or rifampin are used.
British Dictionary definitions for rifampin


a drug used in the treatment of tuberculosis, meningitis, and leprosy
Word Origin
C20: from rifam(y)cin, from Rififi, nickname of the original culture + -mycin + inserted pi(perazine)
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
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rifampin in Medicine

rifampin ri·fam·pin (rĭ-fām'pĭn) or ri·fam·pi·cin (-pĭ-sĭn)
A semisynthetic antibiotic, derived from a form of rifamycin, that interferes with the synthesis of RNA and is used to treat bacterial and viral diseases.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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