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

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

   Hyponym: EER

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

   Coordinate term: EPR

7. (military) Initialism of enhanced radiation.

See also

• go ER

Anagrams

• 're, RE, Re, Ré, r.e., re, re-

French

Proper noun

ER ?

1. (sports) Abbreviation of Erie.