| NBD | neurogenic bladder dysfunction; no brain damage |
|---|---|
| NEMD | nonspecific esophageal motor dysfunction |
| NSD | Nairobi sheep disease; neonatal staphylococcal disease; neurosecretory dysfunction; night sleep depr... |
| NVD | nausea, vomiting, and diarrhea; neck vein distention; neovascularization of the disk; neurovesicle d... |
| OvDF | ovarian dysfunction |