ECII
| Acronym | Definition |
|---|---|
| ECII | Energy Conserving II (motor oil) |
| ECII | Economic Crime Investigation Institute. |
| ECII | Engineered Controls International, Inc. (Elon College, NC) |
| ECII | European Conference of Institutional Ideators (biannual art practices meeting) |
| ECII | Electronic Components Institute Internationale Ltd. (UK) |