ER

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

ER or Er may refer to:

People

Elizabeth Regina, the Latin form of Queen Elizabeth
Eduardus Rex, the Latin form of King Edward
Eleanor Roosevelt, former First Lady of the United States
Er (biblical person), the eldest son of Judah in the biblical book of Genesis
Er, a character in Plato's Myth of Er
Èr, an ancient people inhabiting parts of what are now northern Armenia, northeast Turkey, southern Georgia, and northwest Azerbaijan
Nie Er (1912–1935), Chinese composer
E. R. Eswaran (born 1961), Indian politician and entrepreneur from Tamil Nadu

-er, a suffix added to adjectives or adverbs to form a comparative (e.g. fast to faster)
-er, a suffix added to a verb to make it an agent noun (e.g. cut to cutter)
Oxford "-er", a suffix used to form words like rugger and footer
"er", a filler (linguistics)
Er (Cyrillic) (P / p), a letter of the Cyrillic alphabet corresponding to the Latin letter "R"
Er, alternate spelling for Yer (Ъ / ъ), the hard-sign letter of the Cyrillic alphabet
Er., Hebrew abbreviation for 'Eruvin, the second tractate of Moed
ER, Spanish language abbreviation for Entre Ríos

Acronym for emergency room, a medical facility specializing in acute, emergency care, usually found in a hospital or other primary care center

$\epsilon_r$ , a representation for Relative static permittivity
Electrorheological (ER) fluid, a type of chemical suspension
Endoplasmic reticulum, a type of organelle in cell biology
Enantiomeric ratio, a concept in chemistry
Equine exertional rhabdomyolysis, a syndrome that damages muscle tissue in horses
Estrogen receptor, a type of protein molecule
Evidential reasoning approach, a concept in Decision Theory
Extended release, a mechanism used to release a drug over time
Extraction ratio, a pharmacokinetic property
Symbol for chemical element Erbium on the periodic table