| MER | mean ejection rate; medical emergency room; methanol extraction residue; murmur/energy ratio |
|---|---|
| OEF | oil immersion field; oxygen extraction fraction |
| O2ER | oxygen extraction ratio |
| rOEF | regional oxygen extraction fraction |
| TEC | total electron count; total eosinophil count; total exchange capacity; transient erythroblastopenia ... |