Definition of "quinolone" []

• Any of several isomeric ketones derived from quinoline. (noun)
• Any of a range of broad-spectrum antibiotics, related to nalidixic acid, based on this structure. (noun)

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• "Newer types of anibiotics, such as cephalosporin or quinolone, are also effective."
• "You started seeing quinolone-resistant strains in the United States as early as 2000."
• "You've traced the quinolone-resistant strains to western Asia, so you know where they started circulating."