| Acronym | Definition |
|---|
| MECI➣Modelo Estándar de Control Interno (Spanish: Standard Model of Internal Control) |
| MECI➣Multi-Electron Configuration Interaction |
| MECI➣Mendelson Electronics Company, Inc. (est. 1960; Dayton, OH) |
| MECI➣Mission Essential Contingency Item |
| MECI➣Mono-Excited Configuration Interaction |
| MECI➣Mark Edelstein Consulting Incorporated (Buffalo Grove, Illinois) |