| Acronym | Definition |
|---|
| ECDI | Economic and Community Development Institute |
| ECDI | Expertise Certification et Diagnostics Immobilières (French: Certification and Diagnostics Estate Expertise) |
| ECDI | Early Childhood Development Initiative (Canada) |
| ECDI | Early Child Development Inventory (questionnaire) |
| ECDI | Électricité Contrôle Développement International (French: Electricity Control International Development; various locations) |
| ECDI | 1-Ethyl-3-Diaminopropyl Carbodiimide |
| ECDI | External Class Description, Inherited Class Members |
| ECDI | Electron Cyclotron Drift Instability (earth science) |