| Acronym | Definition |
|---|
| MSEI➣Multidimensional Self-Esteem Inventory |
| MSEI➣Merseyside Social Enterprise Initiative (UK) |
| MSEI➣Mercy Secondary Education Inc. (Alphington, Victoria, Australia) |
| MSEI➣Malta Stock Exchange Index (finance) |
| MSEI➣Multiple Spin-Echo Imaging (magnetic resonance imaging) |
| MSEI➣Modified Self-Esteem Inventory (psychology) |