| MER | mean ejection rate; medical emergency room; methanol extraction residue; murmur/energy ratio |
|---|---|
| MERB | Medical Examination and Review Board |
| MERG | macular electroretinogram |
| MERRF | myoclonus epilepsy with ragged red fibers [syndrome] |
| MERRF Syndrome | Myoclonic Epilepsy & Ragged Red Fibers Syndrome |
| MERRLA | myoclonus epilepsy-ragged red fibers-lactic acidosis [syndrome] |