| Acronym | Definition | 
|---|
| MSSE➣Medicine & Science in Sports & Exercise | 
| MSSE➣Microsoft Security Essentials (computer software) | 
| MSSE➣Mini-Suffering State Examination (scale) | 
| MSSE➣Math, Science and Special Education (various locations) | 
| MSSE➣Ministry of Social Security and Employment (Portugal) | 
| MSSE➣Master of Science in Software Engineering | 
| MSSE➣Microsoft Search Server Express (software) | 
| MSSE➣Multiple Self-Healing Squamous Epithelioma | 
| MSSE➣Message Submission Service Element | 
| MSSE➣Micro and Small Scale Entrepreneurship | 
| MSSE➣methicillin-sensitive Staphylococcus epidermidis | 
| MSSE➣Master of Science in Secondary Education (Rochester Institute of Technology and State University of New York) | 
| MSSE➣Mobile Shared Spectrum Enabler | 
| MSSE➣Marine Safety Specialist Engineering (US Coast Guard) | 
| MSSE➣Market and Social Systems Engineering (lecture series) |