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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.]
(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]
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|Noun||1.||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"