# oxacillin

> English word · Noun · IPA /ˌɒk.səˈsɪl.ɪn/

## Definitions
1. A narrow-spectrum beta-lactam antibiotic made by chemical modification of penicillin and administered in the form of its hydrated sodium salt C₁₉H₁₈N₃NaO₅S·H₂O to treat infections caused by penicillin-resistant staphylococci.

## Etymology
From (is)oxa(zole) + -cillin (“6-aminopenicillanic acid derivative”).

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/oxacillin