cephamycin

noun
ceph·​a·​my·​cin | \ ˌsef-ə-ˈmīs-ᵊn How to pronounce cephamycin (audio) \

Medical Definition of cephamycin

: any of several beta-lactam antibiotics that are produced by various bacteria of the genus Streptomyces or are made semisynthetically and that closely resemble the cephalosporins in structure and pharmacological properties