| Abbreviation | Definition |
|---|---|
| ECMM | European Community Monitor Mission |
| ECMM | European Community Monitoring Mission |
| ECMM | European Confederation of Medical Mycology |
| ECMM | European Conference on Molecular Magnetism |
| ECMRA | European Chemical Market Research Association (now European Chemical Marketing and Strategy Associat |
| ECMS | European Conference on Mineralogy and Spectroscopy |
| ECMWF | European Centre for Medium Weather Forecasts |
| ECN | European Competition Network |
| ECN | European Complement Network |
| ECN | European Crowdfunding Network |
| ECNC | European Centre for Nature Conservation |
| ECNC | European Council of Nuclear Cardiology |
| ECNR | European Center for Nuclear Research |
| ECNS | European Conference on Neutron Scattering |
| ECO | European Communications Office |
| ECO | European Congress on Obesity |
| ECOC | European Capital of Culture |
| ECOC | European Capitals of Culture |
| ECOHR | European Convention On Human Rights |
| ECOHR | European Court Of Human Rights |