ECNI
| 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) |