ER

ER or er may stand for:

Abbreviations

• Elizabeth Regina (Elizabeth the Queen); see Elizabeth I of England and Elizabeth II of the United Kingdom.
• An emergency room in a hospital.
• ER, a popular NBC medical drama set primarily in an emergency room.
• E/R, a less successful 1980s sitcom also set in an emergency room.
• The endoplasmic reticulum in cell biology.
• Equine Exertional Rhabdomyolysis, or Exertional Rhabdomyolysis, a syndrome that causes the degeneration of muscle tissue in a horse.
• An entity-relationship diagram, which is a way of visualizing a database's table layout.
• The ISO country code for Eritrea.
• The chemical symbol for Erbium.