nalidixicacid

na·li·dix·ic acid (nā'lĭ-dĭkʹsĭk) n.

A compound, C₁₂H₁₂N₂O₃, used to treat infections of the genital and urinary tracts caused by gram-negative bacteria.

  [Shortening and alteration of naphthyridine, and carboxylic acid, elements of one of its chemical names.]

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