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/næfˈsɪl.ɪn/ · noun
(pharmacology) 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..
Use nafcillin when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Nafcillin means (pharmacology) 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..
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
Use nafcillin where its definition matches the intended context.
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