clarithromycin
nounUK /kləˌɹɪθ.ɹəʊˈmʌɪ.sɪn/ · US /kləˌɹɪθ.ɹəˈmaɪ.sn̩/
Etymology From Latin clārus (“clear”) + English (e)rythromycin.
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Medicine, Pharmacology, Sciences A semisynthetic macrolide antibiotic C₃₈H₆₉NO₁₃ (trademarks Biaxin, Klaricid) used especially in the treatment of various mild to moderate bacterial infections.