| Acronym | Definition |
|---|
| MCIG | Minecraft Instagram (gaming) |
| MCIG | Macquarie Communications Infrastructure Group (Australia) |
| MCIG | Moranbah Cumulative Impact Group (est. 2010; Australia) |
| MCIG | Matrex Capital Investment Group (Egypt) |
| MCIG | Maine Coon Interest Group (South Africa) |
| MCIG | Middleport Community Input Group (Middleport, NY) |
| MCIG | Multidisciplinary Care Interest Group (University of North Carolina at Chapel Hill School of Medicine) |
| MCIG | Microengineering Common Interest Group (various locations) |
| MCIG | Monumental Credit Insurance Group (Aegon; Netherlands) |
| MCIG | Minimum Concentration that Inhibits Growth |