A broad-spectrum antibiotic produced from strains of the actinomycete Streptomyces fradiae and used especially in the form of its sulfate as an intestinal antiseptic in surgery.

• 新霉素由放线菌类的菌种产生的广谱抗菌素新霉素链菌素，尤其指它的硫酸盐形式，在手术时用作肠道杀菌剂。