oxacillin

[ ok-suh-sil-in ]

/ ˌɒk səˈsɪl ɪn /

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noun Pharmacology.

a semisynthetic penicillin, C19H19N3O5S, used in the treatment of serious staphylococcal infections.

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Origin of oxacillin

1960–65; (is)oxa(zole), a component of its chemical name + (peni)cillin