Any of several toxic antibiotics obtained from a particular soil bacterium

Wikipedia Word definitions in Wikipedia
Polymyxins are antibiotics , with a general structure consisting of a cyclic peptide with a long hydrophobic tail. They disrupt the structure of the bacterial cell membrane by interacting with its phospholipids . They are produced by nonribosomal peptide ...

Wiktionary Word definitions in Wiktionary
n. Any of several toxic antibiotics, derived from the soil bacterium ''Bacillus polymyxa'', used to treat infections by gram-negative bacteria

WordNet Word definitions in WordNet
n. any of several toxic antibiotics obtained from a particular soil bacterium