ER or Er may refer to:
Arts, entertainment and media ER (TV series), a 1994–2009 American medical drama series E/R, a 1984–1985 American TV sitcom Er, a character in Plato's Myth of Er Er, a 2005 album by Nils Petter Molvær ER, a 2021 album by The Kleptones "ER" (song), 2012, by Kanjani Eight "ER", a song by Royce da 5'9" featuring Kid Vishis from the 2011 album Success Is Certain Chico Enterprise-Record, the daily newspaper of Chico, California, US
Businesses and organizations Astar Air Cargo, an American cargo airline, IATA designator ER Eastern Railway zone, in India Estonian Reform Party
Language Er (Cyrillic) (Р р), a letter of the Cyrillic alphabet Er (cuneiform), a sign in cuneiform writing "er", a filler word in English Suffix -er in English: Added to adjectives or adverbs to form a comparative (e.g., fast to faster) Added to a noun to indicate resident of, as in New Yorker Added to a verb to make it an agent noun (e.g., cut to cutter) Oxford "-er", used to form words like rugger and footer R-colored vowel, usually written as "er" in English Erhua, adds er sound to syllables in spoken Mandarin Chinese
People Er (biblical person), the eldest son of Judah in the book of Genesis Nie Er (1912–1935), Chinese composer Elliot Rodger (1991–2014), British-American mass murderer Gültigin Er (born 1997), Turkish triathlete ER, a royal cypher representing a monarch whose name begins with E
Science and technology Biology and medicine Emergency room, or emergency department, a medical facility Endoplasmic reticulum, a type of organelle in cell biology Er blood group system Equine exertional rhabdomyolysis, in horses Estrogen receptor, a type of protein molecule Extraction ratio, in renal physiology
Chemistry and physics , relative permittivity Electrorheological fluid, suspensions of non-conducting but electrically active particles Enantiomeric ratio, in chemistry Erbium, symbol Er, a chemical element Einstein-Rosen bridge, or ER bridge, relativistic wormholes
Computing .er, country code top-level domain for Eritrea Entity–relationship model, a conceptual representation of data Error Resilience, an audio coding method used in MPEG-4 Part 3
Engineering Engine room, a compartment of a ship where the machinery for marine propulsion is located
Other uses Eritrea, ISO 3166-2 country code ER English Reports of the English Courts from 1220 to 1866
See also
ERS (disambiguation) Err (disambiguation) Ur (disambiguation)