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doxy·cy·cline .däk-sə-'sī-.klēn n a broad-spectrum tetracycline antibiotic C22H24N2O8 with potent antibacterial activity that is often taken by travelers as a prophylactic against diarrhea see VIBRAMYCIN
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n.
an antibiotic used to treat infections caused by a wide range of bacteria and other microorganisms. It is administered by mouth and side-effects are those of the other tetracycline. Trade name: Vibramycin.
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doxy·cy·cline (dok″se-siґklēn) [USP] a semisynthetic broad-spectrum antibacterial of the tetracycline group; administered orally.Medical dictionary. 2011.