| MFR | mean flow rate; mucus flow rate |
|---|---|
| MHD | maintenance hemodialysis; mean hemolytic dose; mental health department; minimum hemolytic dilution;... |
| MLAP | mean left atrial pressure |
| MLR | mean length response; middle latency response; mixed lymphocyte reaction |
| MLS | mean lifespan; median life span; median longitudinal section; microphthalmia-linear skin defects [sy... |