| MCA/MR | multiple congenital anomaly/mental retardation [syndrome] |
|---|---|
| MEMR | multiple exostoses-mental retardation [syndrome] |
| MR | Maddox rods; magnetic resistance; magnetic resonance; mandibular reflex; mannose-resistant; may repe... |
| MRSD | mental retardation-skeletal dysplasia [syndrome] |
| MRX | mental retardation, X-linked |