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.]
- ground glass
- ground hemlock
- groundhog
- ground hog
- Groundhog Day
- ground ivy
- groundkeeper
- groundkeeper
- groundless
- groundlessly
- groundlessness
- ground level
- groundling
- ground loop
- groundmass
- ground meristem
- groundnut
- ground out
- groundout
- ground pine
- ground plan
- ground plum
- ground rent
- ground rule
- ground rule double