| Abbreviations | Meaning |
 | NRI | Nerve Root Involvement; Nerve Root Irritation; Nonrespiratory Infection |
| NGSA | Nerve Growth Stimulating Activity |
| UN | Ulnar Nerve; Undernourished; Unilateral Neglect; Updraft Nebulizer; Urea Nitrogen; Urinary Nitrogen |
| OHN | Occupational Health Nurse; Optical Nerve Head |
| NCV | Nerve Conduction Velocity; Noncholera Vibrio |
| NLG | Nerve Conduction Velocities |
| CN VII | Seventh Cranial Nerve [facial] |
| CVII | Seventh Cranial Nerve |
| NAPPS | Nerve Agent Pyridostigmine Pretreatment Set |
| DNR | Dorsal Nerve Root |
| DNS | Diaphragmatic Nerve Stimulation |
| CII | Second Cranial Nerve |
| E COLI | Eighth Nerve Action Potential, Cochlear Nucleus, Olivary Complex (superior), Lateral Lemniscus, Inferior Colliculus [hearing Test] |
| NAVL | Nerve, Artery, Vein, Lymphatic |
| RSNA | Radiological Society Of North America; Renal Sympathetic Nerve Activity |
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