| MEFV | maximal expiratory flow volume |
|---|---|
| MET | maximal exercise test; metabolic equivalent of the task; metastasis, metastatic; methionine; midexpi... |
| MFV | maximal flow-volume [loop] |
| MGD | maximal glucose disposal; mixed gonadal dysgenesis |
| MRAP | alpha-2-macroglobulin; maximal resting anal pressure; mean right atrial pressure |