| Abbreviation | Definition |
|---|---|
| LWCF | Land Water Conservation Fund |
| MBCC | Migratory Bird Conservation Commission |
| MBCD | Medicine Bow Conservation District |
| MBCF | Monarch Butterfly Conservation Fund |
| MBCI | Market Based Conservation Initiative |
| MCAP | Manaslu Conservation Area Project |
| MCCB | Marshall County Conservation Board |
| MCCD | McHenry County Conservation District |
| MCFB | Manitoba Conservation Forestry Branch |
| MCLC | Milwaukee Conservation Leadership Corps |
| MCMF | Marine Conservation Molecular Facility |
| MCRI | Marine Conservation Research Institute |
| MCT | Micronesia Conservation Trust |
| MCV | Montana Conservation Voters |
| MDC | Missouri Department of Conservation |
| MHCP | Multiple Habitat Conservation Program |
| MINC | Masters in International Nature Conservation |
| MJ | Money for Jam (Money for Old Rope) |
| MLCD | Marine Life Conservation Districts |
| MLCT | Madison Land Conservation Trust |