cef·tri·ax·one (sěf'trī-āk'sōn') n. A semisynthetic analogue of cephalosporin, C18H16N8Na2O7S3, that is administered parenterally and has a broad spectrum of antibiotic activity.
Main Entry: cef·tri·a·xone # Pronunciation: "sef-"trI-'ak-"sOn Function: noun : a semisynthetic cephalosporin antibioticC18H18N8O7S3 that is administered parenterally in the form of its sodium salt