ER

See also: Appendix:Variations of "er"

Translingual

Symbol

ER

1. (international standards) ISO 3166-1 alpha-2 country code for Eritrea since 1993.

   Synonym: ERI (alpha-3)

English

Alternative forms

• E.R., E. R. (does not apply to Erie)

Etymology

Abbreviation

Proper noun

ER

1. Initialism of Elizabeth Regina (“Queen Elizabeth”).

   Synonym: EIIR

2. (British) Initialism of Edward Rex (on coins, letterboxes, etc.) The royal cypher for Edward VII, king of Great Britain

   Synonym: EVIIR

3. (US politics) Initialism of Eleanor Roosevelt.
4. (US sports) Abbreviation of Erie (“Erie, Pennsylvania, USA”).

Noun

ER (countable and uncountable, plural ERs)

1. (baseball) Initialism of earned run.

   Coordinate term: ERA

2. (biology) Initialism of endoplasmic reticulum.
3. (computing) Initialism of entity-relationship.

   Alternative form: E-R

   Hyponym: EER

4. (medicine) Initialism of emergency room.
5. (biochemistry) Initialism of estrogen receptor.
6. (physics) Initialism of Einstein-Rosen bridge.

   Alternative form: E-R

   Coordinate term: EPR

7. (military) Initialism of enhanced radiation.

Translations

hospital department — see ED

See also

• go ER

Anagrams

• 're, RE, Re, Ré, r.e., re, re-

French

Proper noun

ER ?

1. (sports) abbreviation of Erie