| Abbreviation | Definition |
|---|---|
| NRR | Noise Reduction Rating |
| NRS | Neuron- Restrictive Silencer |
| NRSF | Neuron- Restrictive Silencer Factor |
| NRT | Natural Recovery Therapy |
| NRT | Neural Response Telemetry |
| NRT | Nicotine Replacement Therapy |
| NS | Nerves |
| NS | Non Specific |
| NS | Non-Specific |
| NS | Normal Saline (i.e., 0.09% NaCl) |
| NSA | Network Spinal Analysis |
| NSAD | No Sign of Acute Disease |
| NSBD | Neck, Shoulder, and Back Disorders |
| NSC | No Significant Change |
| NSC | Non Structural Carbohydrate |
| NSC | Normal State Of Consciousness |
| NSCA | National Subacute Care Association |
| NSCF | Non-Serum-dependent Chemotactic Factor |
| NSD | No Significant Defect |
| NSD | Normal spontaneous delivery |