Dictionary
ox•a•cil•lin
Pronunciation: (ok"su-sil'in), [key]—
n. Pharm.
a semisynthetic penicillin, C
19H
19N
3O
5S, used in the treatment of serious staphylococcal infections.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.