| Abbreviation | Definition |
|---|---|
| MSOP | minimum standard of performance |
| MSOP | Mutual Security Objectives Plan |
| MSP | macrophage-stimulating protein |
| MSP | major secretory protein |
| MSP | Medicare Secondary Payer (USA) |
| MSS | Master of Social Service |
| MSS | Medicare Statistical System |
| MSS | Medium Secure Service |
| MSS | meningococcal septic shock |
| MSS | mental status schedule |
| MSS | microsatellite stability |
| MSS | middle suprasylvian sulcus |
| MSS | minor surgery suite |
| MSS | morphine sulfate solution |
| MSS | Motor Status Scale |
| MSS | multiple sclerosis susceptibility |
| MSS | muscular subaortic stenosis |
| MSS | musculoskeletal symptoms |
| MT | Massage Therapist |
| MTI | malignant teratoma, intermediate |