| 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 |
| OSRD | Office of Scientific Research and Development |
| PDI | pain disability index; periodontal disease index; plan-do integration; psychomotor development index... |