| MAC | MacConkey [broth]; major ambulatory category; malignancy-associated changes; maximum allowable conce... |
|---|---|
| MPC | marine protein concentrate; maximum permissible concentration; mean plasma concentration; meperidine... |
| EC | effective concentration; ejection click; electrochemical; electron capture; embryonal carcinoma; eme... |
| MCC | mean corpuscular hemoglobin concentration; medial cell column; Medical Council of Canada; metacerebr... |
| MEC | median effective concentration; middle ear canal; middle ear cell; minimum effective concentration |