/sef'euh lek"sin/ , n. Pharm.
an oral, antimicrobial drug, C 16 H 7 N 3 O 4 S, used in treating minor respiratory and urinary tract infections and as a backup or alternative to penicillin treatment.
[ 1965-70; CEPHAL(OSPORIN) + -ex- of unclear derivation + -IN 2 ]