| 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) |