PTDI
| 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. |