The meaning of the Acronym URR is...

URR is

• Urea Reduction Ratio

More Meanings For URR:

• UHF Radio Receiver
• UHF Radio Receiver
• Urea Reduction Ratio
• Unexpired Risk Reserve
• Un- Resourced Requirement
• UHF Radio Receiver
• Unconstrained Requirements Report
• UHF Radio Receiver
• Unconstrained Requirements Report
• Usual Running Rate
• UHF Radio Receiver
• Urrao, Colombia
• Union Railroad Company ( Pittsburgh, Pennsylvania)

URR is also in:

• Accounting
• Airport Codes
• Electronics
• Media
• Military
• NASA
• Physiology
• Railroads
• Telecom
• Transportation