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E is the fifth letter of the Latin alphabet. E or e may also refer to:


Commerce and transportation

* €, the symbol for the
euro The euro (currency symbol, symbol: euro sign, €; ISO 4217, code: EUR) is the official currency of 19 of the Member state of the European Union, member states of the European Union. This group of states is known as the eurozone or euro area ...
, the European Union's standard currency unit * ℮, the estimated sign, an EU symbol indicating that the weight or volume of the goods is within specific allowable tolerances * E, the country identifier for vehicle registration plates of Spain * E, a Polish electric locomotive in PKP classification system * E or Eni, an Italian oil and gas company * E-Mark, an approval mark for automotive products in Europe under the World Forum for Harmonization of Vehicle Regulations


Medicine and genetics

*
E number E numbers ("E" stands for "Europe") are codes for substances used as food additives for use within the European Union The European Union (EU) is a political and economic union of Member state of the European Union, member states that ...
, a number code for a food additive, an EU labelling requirement * Haplogroup E (mtDNA), a human mitochondrial DNA (mtDNA) haplogroup * Haplogroup E (Y-DNA), a Y-chromosomal DNA (Y-DNA) haplogroup * E or
glutamic acid Glutamic acid (symbol Glu or E; the ionic form is known as glutamate) is an α-amino acid Amino acids are organic compounds that contain amino (–NH2) and Carboxylic acid, carboxyl (–COOH) functional groups, along with a Substituent, sid ...
, an amino acid, glutamate * ''E. coli'' or ''
Escherichia coli ''Escherichia coli'' (),Wells, J. C. (2000) Longman Pronunciation Dictionary. Harlow ngland Pearson Education Ltd. also known as ''E. coli'' (), is a Gram-negative Gram-negative bacteria are bacteria that do not retain the crystal violet st ...

Escherichia coli
'', a bacterium commonly found in the lower intestine; some are pathogenic, others are not * ''E. coli'' or '' Entamoeba coli'', a non-pathogenic parasite frequently found in the human intestine * Vitamin E or
TocopherolTocopherols (; TCP) are a class of organic chemical compounds (more precisely, various methylated phenol Phenol (also called carbolic acid) is an aromatic organic compound , CH4; is among the simplest organic compounds. In chemistry, organic ...
, a class of chemical compounds * The symbol for the hormone
epinephrine Adrenaline, also known as epinephrine, is a hormone A hormone (from the Greek participle , "setting in motion") is any member of a class of signaling molecules in multicellular organisms, that are transported to distant organs to regulate p ...

epinephrine
* Ecstasy chemical compound
MDMA 3,4-Methylenedioxymethamphetamine (MDMA), commonly known as ecstasy (E) or molly, is a psychoactive drug A psychoactive drug, psychopharmaceutical, or psychotropic drug is a chemical substance that changes nervous system In Biology, b ...

MDMA
*
Ethambutol
Ethambutol


Physics and engineering

* e (or e) or
electron The electron is a subatomic particle, symbol or , whose electric charge Electric charge is the physical property of matter that causes it to experience a force when placed in an electromagnetic field. There are two types of electric charge: ...
, a fundamental subatomic particle * e or
elementary charge The elementary charge, usually denoted by or sometimes e is the electric charge Electric charge is the physical property of matter that causes it to experience a force when placed in an electromagnetic field. There are two types of electric ch ...
, the absolute value of the electric charge carried by a single electron. * e or
coefficient of restitution The coefficient of restitution (COR), also denoted by (e), is the ratio of the final to initial relative velocity between two objects after they collide. It normally ranges from 0 to 1 where 1 would be a perfectly elastic collision. A perfectly i ...
(COR), a measure of the elasticity of a collision in mechanics * E, the symbol for energy in equations concerning mass-energy equivalence * E or Young's modulus, a measure of stiffness in solid mechanics * E or exa-, the SI prefix for 1018 * E-layer or the Kennelly-Heaviside layer, part of the ionosphere * E, the symbol for an electric field * e or orbital eccentricity, a measure of how much a conic section deviates from a circle * E or Equal Energy spectrum, a definition of white point, white in colour printing * E, the electrode potential, the electromotive force of a cell built of two electrodes ** E°, the standard electrode potential


Mathematics and logic

* , also known as Euler's number and Napier's constant, a transcendental number and the base of natural logarithms, approximately equal to 2.718 * E notation, or scientific notation, a way of writing very large and very small numbers * ∃ (a backwards E; U+2203) or existential quantification, the symbol for "there exists...", in predicate logic; ∃! meaning "there exists only one" (or "there exists exactly one") - see Uniqueness quantification * E, 14 in hexadecimal and other positional numeral systems of a base of 15 or higher * \operatorname[X] or Expected value, the average expected outcome of a trial in probability theory * , the Elliptic integral#Complete elliptic integral of the second kind, complete elliptic integral of the second kind * , the identity element


Computing and computation

* E (complexity), a set of decision problems solvable by a Turing machine in a specific time * E (PC DOS), a text editor * E (1970s text editor), a text editor developed at the Stanford AI Lab in the 1970s * E (programming language), an object-oriented programming language * e (verification language) hardware verification language * E (theorem prover), a modern, high performance prover for first-order logic * Amiga E, a programming language * E or Enlightenment (software), a free software open source manager for X Window System * /e/ (operating system), a fork of LineageOS, which in turn is based on Android


Music

* E (musical note) * E major, a scale * E minor, a scale * E major chord, Chord names and symbols (popular music) * E, a nickname of Mark Oliver Everett, musician and front man of the rock band Eels * E (Epik High album), ''[e]'', an album from Korean hip-hop group Epik High * E (video), ''E'' (video), by Eminem * E (Adrian Belew album), ''E'' (Adrian Belew album), 2009 * E (Big Bang album), ''E'' (Big Bang album) * E (Enslaved album), ''E'' (Enslaved album), 2017 * ''E'', a 2019 album by Ecco2K


Television and film

* E!, Entertainment Television, an American cable and satellite TV network **E! (Australia), the Australian version of American E! * E! (Canada): ** E! (Canadian TV system), a defunct over-the-air television system operated by Canwest from 2001 to 2009 (originally known as CH until 2007) ** E! (Canadian TV channel), a Canadian cable/satellite specialty channel owned by Bell Media that launched in November 2010. * E (2006 film), ''E'' (2006 film), a 2006 Tamil film * E (2017 film), ''E'' (2017 film) * E, or Edna Mode, a character from the movie ''The Incredibles'' * E, or Eric Murphy, a character from the television series ''Entourage'' *E, the production code for the 1964 ''Doctor Who'' serial ''The Keys of Marinus''


Geography

* E or east, one of the four cardinal directions * E Township, Maine, an unincorporated community in USA * E (state), a vassal state in Zhou Dynasty China (1046–256 BC) * River E, a river in Scotland * Mount E ( ja, 恵山, E-san, Mount Wisdom), Kameda, Oshima, Hakodate, Hokkaido, Japan; a stratovolcano * E postcode area, for east London * E, New Brunswick's postal code


Languages

* E language, a language of China * É (temple), Sumerian house or temple * E, the Spivak pronoun meaning "he" or "she" * e, the close-mid front unrounded vowel IPA symbol * Е, a letter of the Cyrillic alphabet


People

* E (surname) (), Chinese surname * E, a nickname of Mark Oliver Everett, musician and front man of the rock band Eels * e, a nickname of Eric Neustadter, Operations Manager for Xbox Live and frequent co-host of the "Major Nelson Radio" podcast * Mr. E (disambiguation)


Letters and other characters

* Ⓔ or ⓔ or (e) or (E) - circled-E or circled-E, see Enclosed Alphanumerics * É or é - ''e-acute'', an accented letter of many Latin alphabets. * È or è - ''e-grave'', another accented letter of many Latin alphabets.


Other uses

* e (novel), ''e'' (novel), a 2000 comic novel by Matt Beaumont * E band (disambiguation) * E#, a team's elimination number * E, slang name for the recreational drug Ecstasy, also called
MDMA 3,4-Methylenedioxymethamphetamine (MDMA), commonly known as ecstasy (E) or molly, is a psychoactive drug A psychoactive drug, psychopharmaceutical, or psychotropic drug is a chemical substance that changes nervous system In Biology, b ...

MDMA
* E, or the Elohist, one of the four sources of the Torah * E, or Everyone, a video game rating symbol used by the Entertainment Software Rating Board (ESRB) which is suitable for all ages. * Dominical letter E for a common year starting on Wednesday * E-Z notation, to indicate double bonds that two groups of higher priority are on opposite sides. * E or EDGE, for Enhanced Data Rates for GSM Evolution * List of military time zones#E, Echo, the military time zone code for UTC+05:00 * ''"E" Is for Evidence'', the fifth novel in Sue Grafton's "Alphabet mystery" series, published in 1988


See also

* Eta * Big E (disambiguation) * Block E (disambiguation) * Class E (disambiguation) * E class (disambiguation) * E-Series (disambiguation) * E-Type (disambiguation) * E! (disambiguation) * Formula E (disambiguation) * Group E (disambiguation) * Open E (disambiguation) {{disambiguation