pol·y·myx·in (p l  -m k sn)n. Any of various mainly toxic antibiotics derived from strains of the soil bacterium Bacillus polymyxa and used to treat various infections with gram-negative bacteria. |
polymyxin [ˌpɒlɪˈmɪksɪn]
n
(Medicine / Pharmacology) any of several polypeptide antibiotics active against Gram-negative bacteria, obtained from the soil bacterium Bacillus polymyxa
[from New Latin Bacillus polymyxa; see poly-, myxo-, -in]
ThesaurusLegend: Synonyms Related Words Antonyms
| Noun | 1. | polymyxin - any of several toxic antibiotics obtained from a particular soil bacterium 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" |
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