MSIR
| Acronym | Definition |
|---|---|
| MSIR | Morphine Sulfate Immediate Release (medication) |
| MSIR | Midwest Shiba Inu Rescue (Gurnee, IL) |
| MSIR | Master of Science in International Relations |
| MSIR | Master of Science in Industrial Relations |
| MSIR | Markov Switching Imperfect Repair (reliability model) |
| MSIR | Maximum Signal-to-Interference Ratio |
| MSIR | Master Stock Inventory Record |
| MSIR | Master Stock Item Record |
| MSIR | Morphine Sulphate Instant Release |