| NICHHD | National Institute of Child Health and Human Development |
|---|---|
| NMRDC | Naval Medical Research and Development Command |
| 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 |
| OHDS | Office of Human Development Services |