naf·cil·lin 
(năf′sĭlĭn)
(năf′sĭlĭn)n.
A semisynthetic penicillin, C21H22N2O5S, that is resistant to penicillinase, used in the form of its sodium salt primarily to treat infections caused by penicillinase-producing staphylococcus bacteria.
[naf- (shortening and alteration of NAPHTHALENE) + (PENI)CILLIN.]
- street theater
- streetwalker
- streetwalking
- streetwise
- strength
- strengthen
- strengthener
- strenuous
- strenuously
- strenuousness
- strep
- strepsirhine
- strepsirrhine
- strep throat
- strepto-
- streptobacillus
- streptocarpus
- streptococcal
- streptococcic
- streptococcus
- streptodornase
- streptokinase
- streptolysin
- streptomyces
- streptomycin