| MCN | maternal child nursing; minimal change nephropathy; mixed cell nodular [lymphoma] |
|---|---|
| MCTD | mixed connective tissue disease |
| MD | Doctor of Medicine [Lat. Medicinae Doctor]; magnesium deficiency; main duct; maintenance dose; major... |
| MECG | mixed essential cryoglobulinemia |
| MFO | medium frequency oscillator; mixed function oxidase |