ER

Look up er, 'er, -er, Er, or ER in Wiktionary, the free dictionary.

ER or Er may refer to:

Medicine

• Emergency room, a department of a hospital
  • ER (TV series), a 1994–2009 NBC medical drama
  • E/R, a 1984–1985 CBS sitcom

Natural science

• Erbium, a chemical element
• Relative static permittivity, a concept in chemistry represented as ε_r
• Estrogen receptor, a type of protein molecule
• Endoplasmic reticulum, a type of organelle in cell biology
• Equine Exertional Rhabdomyolysis, a disease found in horses

Parts of language

• Er (Cyrillic) (Р р), a letter in the Cyrillic alphabet
• The suffix -er
• A filler word

Technology

• ER (Extended Range), a classification of missiles and aircraft
• Engineer, a profession
• Entity-relationship model, a database modeling method
• Error Resilience, an audio coding method used in MPEG-4 Part 3

Other uses

• Er (Biblical name)
• Earned run, a term in the game of baseball
• Eesti Rahvusringhääling, an Estonian public broadcasting organization
• Evidential reasoning approach, a concept in Decision Theory
• Chico Enterprise-Record, a newspaper
• Eritrea, an African country (ER in ISO 3166-1 alpha-2 code)
• Astar Air Cargo, an airline (ER in IATA code)
• Er, an album by Nils Petter Molvær
• Er, the subject of Plato's Myth of Er
• Eduardus Rex, Latin initials used by King Edward I through VII
• Elizabeth Regina, initials used by Queen Elizabeth II

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