| NMSIDS | near-miss sudden infant death syndrome |
|---|---|
| NND | neonatal death; New and Nonofficial Drugs; nonspecific nonerosive duodenitis |
| NOD | Naito-Oyanagi disease; National Organization on Disability; nodular melanoma; nonobese diabetic; not... |
| NSIDS | near sudden infant death syndrome |
| ORD | optical rotatory dispersion; oral radiation death |