| CSN | cardiac sympathetic nerve; carotid sinus nerve |
|---|---|
| NE | national emergency; necrotic enteritis; necrotizing enterocolitis; nephropathia epidemica; nerve end... |
| NRI | nerve root involvement; nerve root irritation; nonrespiratory infection |
| PN | papillary necrosis; parenteral nutrition; penicillin; perceived noise; percussion note; periarteriti... |
| AFA | acromegaloid facial syndrome; advanced first aid; alcohol-formaldehyde-acetic [fixative] |