| MD | Doctor of Medicine [Lat. Medicinae Doctor]; magnesium deficiency; main duct; maintenance dose; major... |
|---|---|
| MDC | major diagnostic categories; Metoprolol in Dilated Cardiomyography [trial]; minimum detectable conce... |
| MDD | major depressive disorder; mean daily dose |
| MDE | major depressive episode |
| MHA | major histocompatibility antigen; May-Hegglin anomaly; Mental Health Association; methemalbumin; mic... |