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

• 多粘菌素一种大部分为有毒的抗生素，从土壤中的多粘菌菌株中提取，用来治疗由革兰氏阴性细菌引起的各种感染