| MEC | median effective concentration; middle ear canal; middle ear cell; minimum effective concentration |
|---|---|
| MED | median erythrocyte diameter; medical, medication, medicine; Medical Entities Dictionary; minimum eff... |
| med | medial; median; medication; medicine, medical; medium |
| MLD | manual lymph drainage; median lethal dose; metachromatic leukodystrophy; minimal lesion disease; min... |
| MLD50 | median lethal dose |