n :  a synthetic antibacterial drug C₁₄H₁₈N₄O₃ used alone esp. to treat urinary tract infections and Pneumocystis carinii pneumonia and in combination with sulfamethoxazole to treat these as well as other infections (as shigellosis or acute otitis media) - see BACTRIM  .
 
 
 
Published under license with Merriam-Webster, Incorporated.  © 1997-2024.