ER

noun7

1. •
   Initialism of emergency room.
2. •
   Initialism of endoplasmic reticulum.
3. •
   Initialism of earned run.
4. •
   Initialism of entity-relationship.
5. •
   Initialism of estrogen receptor.
6. •
   Initialism of enhanced radiation.
7. •
   Initialism of Einstein-Rosen bridge.