The meaning of the Acronym NNR is...

NNR is

• Natural Nitrate Reduction

More Meanings For NNR:

• Noworyta News Reader
• Natural Nitrate Reduction
• National Nude Registery
• Not necessary to return
• Noworyta News Reader
• Nielsen Net Ratings
• Neurorehabilitation and Neural Repair
• Northwest Nonprofit Resources

NNR is also in:

• Adults
• Chemistry
• Media
• Non-Profit Organizations
• Physiology
• Software