nafcillin

N1A1F4C3I1L1L1I1N1
US/næfˈsɪl.ɪn/

noun

A semisynthetic penicillin that is resistant to beta-lactamase and is used especially in the form of its hydrated sodium salt C₂₁H₂₁N₂NaO₅S·H₂O as an antibiotic.

Similar
Nafcil
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Meanings

nounnafcillin (uncountable)
  1. uncountablemedicineA semisynthetic penicillin that is resistant to beta-lactamase and is used especially in the form of its hydrated sodium salt C₂₁H₂₁N₂NaO₅S·H₂O as an antibiotic.

Synonyms & antonyms

nouna penicillinase-resistant form of penicillin (trade name Nafcil) used (usually in the form of its sodium salt) to treat infections caused by penicillin-resistant strains of staphylococci

Similar
Nafcil
Broader
penicillinase-resistant antibiotic

Synonym sets from Open English WordNet, CC BY 4.0.

Origin

From naph(thalene) + -cillin (“6-aminopenicillanic acid derivative”).

Full word history & related roots →

Rhymes & wordplay

Rhymes with nafcillin

amoxicillinpenicillinampicillintheophyllinepiperacillinoxacillinticarcillincarbenicillincloxacillindicloxacillinbenzylpenicillincarindacillin-cillinmeticillinphenoxymethylpenicillin
All rhymes →
Cite this entry
APA

nafcillin. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/nafcillin

MLA

“nafcillin.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/nafcillin. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “nafcillin,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/nafcillin.

Source: nafcillin on Wiktionary, CC BY-SA 4.0.