| Acronym | Definition |
|---|
| PTDI➣Provisional Tolerable Daily Intake (maximum daily exposure level to a contaminant) |
| PTDI➣Productivity Design Tools Incorporated (Vancouver, BC, Canada) |
| PTDI➣Palm Tree Death Incident (thrash metal band) |
| PTDI➣Primary Test Data Input |
| PTDI➣Pulsed Tissue Doppler Imaging |
| PTDI➣Professional Truck Drivers Institute, Inc. |