| Abbreviation | Definition |
|---|---|
| MAS | Marital Adjustment Scale |
| MAS | masseter |
| MAS | McCune-Albright syndrome |
| MAS | milk-alkali syndrome |
| MAS | minimal access surgery |
| MAS | Minor Ailment Scheme |
| MAS | motor assessment scale |
| MAS | myoclonic absence seizure |
| MASA | Mann Assessment of Swallowing Ability |
| MASC | masculine |
| MASC | Medical Academic Staff Committee |
| MASC | Medical Advisers Support Centre |
| MASH | Multi-Agency Safeguarding Hub |
| MAST | mastectomy |
| MAST | mastitis |
| MAST | mastoid |
| MAST | medical antishock trousers |
| MAST | military anti shock trousers |
| MAST | mitochondrial aspartate aminotransferase |
| MAST | mitochondrial AST |