| 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 |
| OHIPD | Office of Health Information Programs Development |
| PDI | pain disability index; periodontal disease index; plan-do integration; psychomotor development index... |