IIEC
| Acronym | Definition |
|---|---|
| IIEC | International Institute for Energy Conservation |
| IIEC | Inter-Institutional Equipment Committee (advisory body; Hong Kong) |
| IIEC | Iran International Exhibitions Company |
| IIEC | Islamic International Engineering College (Pakistan) |
| IIEC | International Institute for Environmental Communication (Charlottesville, VA) |
| IIEC | Isolated Intestinal Epithelial Cells (physiology) |