What does "oxacillin" mean?

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.

How do you pronounce "oxacillin"?

Pronounced //ˌɒk.səˈsɪl.ɪn//.

Oxacillin

//ˌɒk.səˈsɪl.ɪn// noun

noun ·Rare ·Advanced level

Definitions

Noun

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. countable, uncountable
2
a form of penicillin resistant to penicillinase and effective against penicillin-resistant staphylococci wordnet

Etymology

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

Related phrases

beta lactam

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.