ER

ER or er may stand for:

Elizabeth Regina (Elizabeth the Queen); see Elizabeth I of England and Elizabeth II of the United Kingdom.
The biblical figure Er, the eldest son of Judah.

An emergency room in a hospital, wherein victims arrive in emergency situations (usually by ambulance) or much to the dismay of emergency physicians and nurses, when they have a minor illness but are unable to see a family doctor.
- 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, which can be either rough or smooth.
Equine Exertional Rhabdomyolysis, or Exertional Rhabdomyolysis, a syndrome that causes the degeneration of muscle tissue in a horse. It is more commonly known as tying up or Monday Morning Disease.
In baseball, an earned run; a run that was scored without the aid of an error by the fielding team.
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.

A word in the Dutch language, with five different meanings.
A word in the Danish language, meaning is.
A word in the Norwegian language, meaning is.
A word in the German language, meaning he.
Er (Р), a letter in the Cyrillic alphabet.
The English sound "er," indicating hesitation, similar to huh and other speech disfluencies.

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ER

See also: ER, 1980s, Ambulance, Baseball, Cell biology, Chemical symbol, Cyrillic alphabet, Danish language, Dutch language