| Acronym | Definition |
|---|
| ECMM | Electrochemical Micromachining |
| ECMM | European Confederation of Medical Mycology (est. 1993) |
| ECMM | European Community Monitor Mission (now European Union Monitoring Mission; diplomatic mission to Bosnia and Herzegovina starting 1991) |
| ECMM | European Conference on Molecular Magnetism |
| ECMM | Études Constructions Métalliques et Mécaniques (French: Mechanical and Metallic Construction Studies) |
| ECMM | East Coast Mobile Medical, Inc. (Canada) |
| ECMM | Ethyl Carbonate Molecular Modification |
| ECMM | Embedded Cable Modem Module |
| ECMM | Ether Carbon Molecular Modification |
| ECMM | Enumeration of Chinese Materia Medica |