| Acronym | Definition |
|---|
| ECNI➣Equality Commission for Northern Ireland (UK) |
| ECNI➣Electron-Capture Negative-Ion (spectrometry) |
| ECNI➣European Confederation of Nautical Industries |
| ECNI➣Échelle Collective de Niveau Intellectuel (French: Collective Intellectual Level Scale) |
| ECNI➣EyeCashNetworks, Inc. (Glendale, CA) |