1) Antibacterial 2) Antibacterial drug 3) Bactericide 4) Macrodantin 1) Macrodantin 
<chemical> A urinary anti-infective agent effective against most gram-positive and gram-negative organisms. Although sulfonamides and antibiotics are usually the agents of choice for urinary tract infections, nitrofurantoin is widely used for prophylaxis and long-term suppression. ... Pharmacological action: anti-infective agents, urinary. .....
(ni″tro-fu-ran´to-in) a broad-spectrum antibacterial agent used in treatment of urinary tract infections.
Type: Term Pronunciation: nī′trō-fyū-ran′tō-in Definitions: 1. A urinary antibacterial agent with a wide range of activity against both gram-positive and gram-negative organisms; also available as nitrofurantoin sodium for injection.
[n] - derivative of nitrofuran used as an antibacterial medicine (trade name Macrodantin) effective against a broad range of Gram-positive and Gram-negative bacteria
Macrodantin noun 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 tract
an antimicrobial substance, CHNO, used for the treatment of urinary tract infections.