| NMRDC | Naval Medical Research and Development Command |
|---|---|
| NMSIDS | near-miss sudden infant death syndrome |
| NSIDS | near sudden infant death syndrome |
| OCD | obsessive compulsive disorder; Office of Child Development; Office of Civil Defense; osteochondritis... |
| OHD | hydroxyvitamin D; Office of Human Development; Ondine-Hirschsprung disease; organic heart disease |