A semisynthetic antibiotic, C19 H18 ClN3 O5 S, used in the form of its sodium salt to treat infections caused by staphylococci, streptococci, or pneumococci.
A semisynthetic penicillin, C19 H18 ClN3 O5 S, that is resistant to penicillinase, used in the form of its sodium salt primarily to treat infections caused by penicillinase-producing staphylococcus bacteria.
Origin of cloxacillin
- c(h)l(oro)– ox(o)– a(zo)– (peni)cillin
From American Heritage Dictionary of the English Language, 5th Edition