| 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 |
| MHR | major histocompatibility region; malignant hyperthermia resistance; maternal heart rate; maximal hea... |