| MMR | mass miniature radiography; masseter muscle rigidity; maternal mortality rate; measles-mumps-rubella... |
|---|---|
| EPB | Extensor Pollisis Brevis |
| ECRB | extensor carpi radialis brevis |
| ECRL | extensor carpi radialis longus |
| ECU | environmental control unit; extended care unit; extensor carpi ulnaris |