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A semi-synthetic antibiotic, C₁₅ H₂₃ N₃ O₃ S, related to penicillin, which is administered intravenously or intramuscularly, especially in the treatment of infection by Gram-negative enteric bacteria.
The U.S. Approved Name (1989) is amdinocillin.
1970s; earliest use found in Chemotherapy. From me- + -cillin + am- (in amino-).