| Acronym | Definition |
|---|
| MCSU➣Mizoram Chakma Students' Union (Mixoram, India) |
| MCSU➣Mobile Catering Support Unit (UK Royal Air Force) |
| MCSU➣Maria Curie Sklodowska University (Lublin, Republic of Poland) |
| MCSU➣Micro Central Switching Unit |
| MCSU➣Meetings Control and Servicing Unit (UN) |
| MCSU➣Multi Channel Service Unit |
| MCSU➣Molybdopterin Cofactor Sulfurase Gene (biochemistry) |
| MCSU➣Mass Casualty Support Unit (various locations) |
| MCSU➣Mobile Crime Scene Unit (various locations) |