| MIFR | maximal inspiratory flow rate |
|---|---|
| MMFR | maximum midexpiratory flow rate; maximal midflow rate |
| MRAP | alpha-2-macroglobulin; maximal resting anal pressure; mean right atrial pressure |
| MST | maximal stimulation test; mean survival time; mean swell time; mercaptopyruvate sulfurtransferase; m... |
| MSVC | maximal sustained ventilatory capacity |