monobactam
/ˌmɒnə(ʊ)ˈbaktəm/Pharmacology
noun
Any of a class of monocyclic antibiotics that consist of a single β-lactam ring with an amino- or amide-containing side chain, originally isolated from bacteria and now also manufactured synthetically.
Origin
1980s. From mono- + -b- + -actam: see quot. 1981.