| PDD | Percentage Depth Dose |
|---|---|
| PDD | Pervasive Developmental Disorder |
| PDD | Photodynamic diagnosis |
| PDD | Prescribed daily dose |
| PDD | Primary Degenerative Dementia |
| PDD-NOS | Pervasive Developmental Disorder Not Otherwise Specified |
| PDE | 3',5'-phosphodiesterase |
| PDE | AMP)-phosphodiesterase |
| PDE | Peritoneal dialysis effluent |
| PDE | Personality Disorder Examination |