one of several broad spectrum antibiotic substances obtained from fungi and related to penicillin (trade name Mefoxin); addition of side chains has produced semisynthetic antibiotics with greater antibacterial activity.

• 从与青霉素有关的药物中得来的大光谱抗生素（商标是头霉噻吩甲氧头孢菌素钠）；有更大抗菌作用的半合成抗生素。