| Acronym | Definition |
|---|
| TCDI | Turbo Common Rail Diesel Injection |
| TCDI | Transportation and Community Development Initiative |
| TCDI | Target Collimator Dump Injection (European Organization for Nuclear Research; Switzerland) |
| TCDI | Transcranial Color Doppler Imaging |
| TCDI | Traffic Control Device Inventory |
| TCDI | Tourism Capacity Development Initiative (Ghana) |
| TCDI | The Concrete Doctor, Inc. |
| TCDI | Turbo Charged Common Rail Direct Injection (General Motors engine technology) |
| TCDI | Technology Concepts and Design, Incorporated |
| TCDI | 1,1'-Thiocarbonyl Diimidazole |
| TCDI | Tullow Community Development Initiative (Ireland) |
| TCDI | The Computer Department, Inc. |
| TCDI | The Cat Dragged Inn (web forum) |
| TCDI | Thematic Coding of Dyadic Interactions |
| TCDI | The Camp Doctor Inc. (Richmond, VA) |
| TCDI | The Child Development Institute (Clifton, NJ) |
| TCDI | Travel Card Directory |
| TCDI | Trinity College, Dublin, Ireland |
| TCDI | Trans-Cranial Doppler Imaging |
| TCDI | Traffic Control Database Inventory |