| Acronym | Definition |
|---|
| MTWA➣Microvolt T-Wave Alternans |
| MTWA➣Midwest Travel Writers Association (Fayette, MO) |
| MTWA➣Martin Turner's Wishbone Ash (band) |
| MTWA➣Maximum Total Weight Authorised |
| MTWA➣Mean Temperature of the Warmest Month |
| MTWA➣Metro Toronto Wrestling Association |
| MTWA➣Maximum Takeoff Weight Authorized |