| XMR | X-linked mental retardation |
|---|---|
| XRMR | X-linked recessive mental retardation |
| MD | Doctor of Medicine [Lat. Medicinae Doctor]; magnesium deficiency; main duct; maintenance dose; major... |
| MH | malignant histiocytosis; malignant hyperpyrexia; malignant hypertension; malignant hyperthermia; mam... |
| MHI | malignant histiocytosis of intestine; Mental Health Index; Mental Health Inventory |