nafcillin
US/næfˈsɪl.ɪn/
nafcillin 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.

Noun
nafcillin (uncountable)
- 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.
Origin of nafcillin
From naph(thalene) + -cillin (“6-aminopenicillanic acid derivative”).
Words that rhyme with nafcillin
- penicillin
- -cillin
- amoxicillin
- ampicillin
- benzylpenicillin
- carbenicillin
- carindacillin
- cloxacillin
- dicloxacillin
- methicillin
- meticillin
- oxacillin
4 more rhymesFewer rhymes
Questions about nafcillin
- What does nafcillin mean?
- Nafcillin means 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.
- What part of speech is nafcillin?
- Nafcillin is a noun.
- How do you pronounce nafcillin?
- Nafcillin is pronounced /næfˈsɪl.ɪn/ (US).
Words near nafcillin in the dictionary
Source and license
Adapted from Wiktionary: nafcillin (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.
Last updated:
Cite this entry: “nafcillin.” Word.ws, https://word.ws/nafcillin. Based on Wiktionary, CC BY-SA 4.0.
