| Acronym | Definition |
|---|
| MSDI➣Mid-South Delta Initiative |
| MSDI➣Multi Single Document Interface |
| MSDI➣Marine Spatial Data Infrastructure |
| MSDI➣Multiple Single Document Interface (word processing software) |
| MSDI➣Missouri State Debate Institute (Springfield, MO) |
| MSDI➣Maine Summer Dramatic Institute (Portland, ME; now defunct) |
| MSDI➣Master of Science in Diagnostic Imaging |
| MSDI➣Multigated Spectral Doppler Imaging (radiology) |