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oxacillin

[ok-suh-sil-in]
noun Pharmacology.
  1. 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
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018