| MEC | median effective concentration; middle ear canal; middle ear cell; minimum effective concentration |
|---|---|
| mec | meconium |
| MeCCNU | methylchloroethylcyclohexylnitrosourea [semustine] |
| MECG | mixed essential cryoglobulinemia |
| MECP | methyl-CpG-binding protein |
| MECTA | mobile electroconvulsive therapy apparatus |
| MECY | methotrexate and cyclophosphamide |