| Abbreviation | Definition |
|---|---|
| MCSN | Musical Copyright Society of Nigeria |
| MCSN | Musical Copyrigt Society Nigeria |
| MCSQ | Mainland Chinese Society Queensland |
| MCTS | Munich Center for Technology in Society |
| MDA | ³€ãT«x |
| MDA | A`ome´n Ko?uqia¯ngyi¯ Xue´hui` |
| MDA | A omen Ko uqiangyi Xuehui |
| MDA | Aomen Kouqiangyi Xuehui |
| MDA | Associação de Estomatologia de Macau |
| MDA | Associao de Estomatologia de Macau |
| MDA | Macau Dental Association |
| MDAS | Match Day Appreciation Society |
| MDAS | Mount Diablo Astronomical Society |
| MDAS | Mount Diablo Audubon Society |
| MDMS | Mountain District Musical Society |
| MDS | Movement Disorder Society |
| MDSI | Movement Disorders Society of India |
| MEAS | Mature Enjoyment of Alcohol in Society |
| MEE | Hungarian Electrotechnical Association |
| MEE | Magyar Elektrotechnikai Egyeslet |