co-trimoxazole
noun
co-tri·mox·a·zole
| \ ˌkō-ˌtrī-ˈmäk-sə-ˌzōl
\
\
Medical Definition of co-trimoxazole
: a bactericidal combination of trimethoprim and sulfamethoxazole in the ratio of one to five used especially for chronic urinary tract infections