| 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... |
| PDP | pattern disruption point; piperidinopyrimidine; platelet-derived plasma; primer-dependent deoxynucle... |