| Noun | 1. | Macrodantin - derivative of nitrofuran used as an antibacterial medicine (trade name Macrodantin) effective against a broad range of Gram-positive and Gram-negative bacteria; used to treat infections of the urinary tractantibacterial, antibacterial drug, bactericide - any drug that destroys bacteria or inhibits their growth nitrofuran - derivative of furan used to inhibit bacterial growth |