| MEF | maximal expiratory flow; middle ear fluid; midexpiratory flow; migration enhancement factor; mouse e... |
|---|---|
| MF | magnetic field; meat free; medium frequency; megafarad; membrane filler; merthiolate-formaldehyde [s... |
| OALF | organic acid labile fluid |
| PA | partial pressure of arterial fluid |
| PAFD | percutaneous abscess and fluid drainage; pulmonary artery filling defect |