Origin of tyrothricin
New Latin Tyrothoric-, Tyrothrix, genus name formerly applied to various bacteria
First Known Use: 1940
Medical Definition of tyrothricin
: an antibiotic mixture that consists chiefly of tyrocidine and gramicidin, is obtained from a soil bacterium of the genus Bacillus (B. brevis), and is used in the topical treatment of infections especially of the skin and mouth caused by gram-positive bacteria
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