| NMI | no mental illness; normal male infant |
|---|---|
| NMP | normal menstrual period; nucleoside monophosphate |
| NMS | Naval Medical School; neuroleptic malignant syndrome; neuromuscular spindle; normal mouse serum |
| NN | neonatal; nevocellular nevus; normally nourished; normal nutrition; nurse's notes |
| NOR | noradrenaline; normal; nortriptyline; nucleolar organizer region |