| Acronym | Definition |
|---|
| MSSR | Master (title) |
| MSSR | Monopulse Secondary Surveillance Radar |
| MSSR | McCormick & Schmick's Seafood Restaurants, Inc. |
| MSSR | Moldavian Soviet Socialist Republic (now Moldova) |
| MSSR | Morphine Sulfate Sustained Release (pain management) |
| MSSR | Mixer Based Scalar Stimulus Response (microwaves) |
| MSSR | Moderated School Self Review (UK) |
| MSSR | Marine Scout Sniper Rifle |
| MSSR | Milestone Schedule and Status Report |
| MSSR | Minimum Sum of Squared RDS (Running Digital Sum) |
| MSSR | Mission and Science Scheduling Room |
| MSSR | Monthly Schedule Status Review |
| MSSR | Multi-State System Reliability |
| MSSR | Monthly Statement of Services Rendered |
| MSSR | Master of Spatial Science Research |
| MSSR | Mechanical Solid State Reduction |