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A substance obtained from the bacterium Bacillus brevis, composed chiefly of the polypeptide antibiotics tryocidine and gramicidin and used for topical treatment of infections caused by gram-positive bacteria.

[New Latin Tȳrothrix, former bacteria genus name (Greek tūros, cheese; see teuə- in the Appendix of Indo-European roots + Greek thrix, trikh-, hair, of unknown origin ) + -in.]
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) an antibiotic, obtained from the soil bacterium Bacillus brevis, consisting of tyrocidine and gramicidin and active against Gram-positive bacteria such as staphylococci and streptococci: applied locally for the treatment of ulcers and abscesses
[C20: from New Latin Tyrothrix (genus name), from Greek turos cheese + thrix hair]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.tyrothricin - a mixture of antibiotics applied locally to infections caused by Gram-positive bacteria
antibiotic, antibiotic drug - a chemical substance derivable from a mold or bacterium that can kill microorganisms and cure bacterial infections; "when antibiotics were first discovered they were called wonder drugs"
tyrocidin, tyrocidine - a basic polypeptide antibiotic derived from a soil bacterium; a major component of tyrothricin
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
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Trends in the susceptibility of methicillin-resistant Staphylococcus aureus to nine antimicrobial agents, including ceftobiprole, nemonoxacin, and tyrothricin: results from the tigecycline in vitro surveillance in Taiwan (TIST) study, 2006-2010.
American bacteriologist Rene Dubos first used an antibiotic, tyrothricin, successfully in the treatment of human disease in 1939.