C23H26N5NaO7S;a semisynthetic extended spectrum penicillin active against a wide variety of Gram-positive and Gram-negative bacteria. ... (05 Mar 2000) ... 
Type: Term Pronunciation: pi-per′ă-sil′in sō′dē-ŭm Definitions: 1. A semisynthetic extended spectrum penicillin active against a wide variety of gram-positive and gram-negative bacteria.