The story
From dichl(oro) + oxacillin.
Etymology from Wiktionary, CC BY-SA 4.0.
dicloxacillin
Today it means: A narrow-spectrum beta-lactam antibiotic of the penicillin class, used in the form of its hydrated sodium salt C₁₉H₁₆Cl₂N₃NaO₅S·H₂O especially against beta-lactamase producing staphylococci. Full definition →