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 ( symbol: €; code: EUR) is the official currency of 19 out of the member states of the European Union (EU). This group of states is known as the eurozone or, officially, the euro area, and includes about 340 million citizens . ...

, the European Union's standard currency unit * ℮, the

estimated sign The estimated sign, , also referred to as the e-mark or () can be found on most prepacked products in the European Union (EU). Its use indicates that the prepackage fulfils EU Directive 76/211/EEC, which specifies the maximum permitted tolerance ...

, an EU symbol indicating that the weight or volume of pre-packaged goods is within specific allowable tolerances * E, the country identifier for

vehicle registration plates of Spain Vehicle registration plates are the mandatory number plates used to display the registration mark of a vehicle, and have existed in Spain since 1900. Most motor vehicles which are used on public roads are required by law to display them. The gov ...

* E, a Polish electric locomotive in

PKP classification system PKP classification system (Polish locomotive designation) is a system of assigning letters and numbers to series and individual locomotives used by the PKP - Polish national railroad operator. The system was introduced for the steam stock by the ...

* E or

Eni Eni S.p.A. () is an Italian multinational energy company headquartered in Rome. Considered one of the seven "supermajor" oil companies in the world, it has operations in 69 countries with a market capitalization of US$54.08 billion, as of 11 Ap ...

, 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 The World Forum for Harmonization of Vehicle Regulations is a working party (WP.29) of the Inland Transport Committee (ITC) of the United Nations Economic Commission for Europe (UNECE). Its responsibility is to manage the multilateral Agreements ...

E (Los Angeles Railway) E refers to two streetcar routes in Los Angeles, California which were operated by the Los Angeles Railway. The first incarnation was in service from 1920 to 1932 when it was redesignated as route 5. The second existed between 1920 and 1946, ...

E (New York City Subway service) The E Eighth Avenue Local is a rapid transit service in the B Division (New York City Subway), B Division of the New York City Subway. Its route emblem, or "bullet", is blue since it uses the IND Eighth Avenue Line in Manhattan. The E operates ...

, a Subway service in New York * E Line (Los Angeles Metro) * Line E of the Buenos Aires Subte

Medicine and genetics

E number E numbers ("E" stands for "Europe") are codes for substances used as food additives, including those found naturally in many foods such as vitamin C, for use within the European Union (EU) and European Free Trade Association (EFTA). Commonly ...

, a number code for a food additive, an EU labelling requirement * Haplogroup E (mtDNA), a human mitochondrial DNA (mtDNA) haplogroup *

Haplogroup E (Y-DNA) Haplogroup E-M96 is a human Y-chromosome DNA haplogroup. It is one of the two main branches of the older and ancestral haplogroup DE, the other main branch being haplogroup D. The E-M96 clade is divided into two main subclades: the more common ...

, 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 that is used by almost all living beings in the biosynthesis of proteins. It is a non-essential nutrient for humans, meaning that the human body can synt ...

, 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, facultative anaerobic, rod-shaped, coliform bacterium of the genus '' Esc ...

'', 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

Tocopherol Tocopherols (; TCP) are a class of organic chemical compounds (more precisely, various methylated phenols), many of which have vitamin E activity. Because the vitamin activity was first identified in 1936 from a dietary fertility factor in rat ...

, a class of chemical compounds * The symbol for the hormone

epinephrine Adrenaline, also known as epinephrine, is a hormone and medication which is involved in regulating visceral functions (e.g., respiration). It appears as a white microcrystalline granule. Adrenaline is normally produced by the adrenal glands and ...

* E, a common abbreviation for 'Ecstasy' (a familiar name for the psychoactive recreational drug

MDMA 3,4-Methylenedioxymethamphetamine (MDMA), commonly seen in tablet form (ecstasy) and crystal form (molly or mandy), is a potent empathogen–entactogen with stimulant properties primarily used for recreational purposes. The desire ...

) * Ethambutol *

Estradiol (medication) Estradiol (E2) is a medication and naturally occurring steroid hormone. It is an estrogen and is used mainly in menopausal hormone therapy and to treat low sex hormone levels in women. It is also used in hormonal birth control for women, i ...

, particularly in transgender contexts

Physics and engineering

* e (or e⁻) or

electron The electron ( or ) is a subatomic particle with a negative one elementary electric charge. Electrons belong to the first generation of the lepton particle family, and are generally thought to be elementary particles because they have n ...

, a fundamental subatomic particle * e or

elementary charge The elementary charge, usually denoted by is the electric charge carried by a single proton or, equivalently, the magnitude of the negative electric charge carried by a single electron, which has charge −1 . This elementary charge is a fundam ...

, 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 speed between two objects after they collide. It normally ranges from 0 to 1 where 1 would be a perfectly elastic collision. A perfec ...

(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 Young's modulus E, the Young modulus, or the modulus of elasticity in tension or compression (i.e., negative tension), is a mechanical property that measures the tensile or compressive stiffness of a solid material when the force is applied ...

, a measure of stiffness in solid mechanics * E or

exa- A metric prefix is a unit prefix that precedes a basic unit of measure to indicate a multiple or submultiple of the unit. All metric prefixes used today are decadic. Each prefix has a unique symbol that is prepended to any unit symbol. The pre ...

, the SI prefix for 10¹⁸ * E-layer or the Kennelly-Heaviside layer, part of the ionosphere * E, the symbol for an

electric field An electric field (sometimes E-field) is the physical field that surrounds electrically charged particles and exerts force on all other charged particles in the field, either attracting or repelling them. It also refers to the physical field ...

* e or

orbital eccentricity In astrodynamics, the orbital eccentricity of an astronomical object is a dimensionless parameter that determines the amount by which its orbit around another body deviates from a perfect circle. A value of 0 is a circular orbit, values bet ...

, a measure of how much a conic section deviates from a circle * E or Equal Energy spectrum, a definition of

white White is the lightest color and is achromatic (having no hue). It is the color of objects such as snow, chalk, and milk, and is the opposite of black. White objects fully reflect and scatter all the visible wavelengths of light. White ...

in colour printing * E, the

electrode potential In electrochemistry, electrode potential is the electromotive force of a galvanic cell built from a standard reference electrode and another electrode to be characterized. By convention, the reference electrode is the standard hydrogen electrode ...

, the electromotive force of a cell built of two electrodes ** E° or

E^\ominus

, the

standard electrode potential In electrochemistry, standard electrode potential E^\ominus, or E^\ominus_, is a measure of the reducing power of any element or compound. The IUPAC "Gold Book" defines it as: ''"the value of the standard emf (electromotive force) of a cell in wh ...

Mathematics and logic

* , the mathematical constant 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 such as 5E7 * ∃ (a backwards E; U+2203) or

existential quantification In predicate logic, an existential quantification is a type of quantifier, a logical constant which is interpreted as "there exists", "there is at least one", or "for some". It is usually denoted by the logical operator symbol ∃, which, ...

, the symbol for "there exists...", in predicate logic; ∃! meaning "there exists only one" (or "there exists exactly one") - see

Uniqueness quantification In mathematics and logic, the term "uniqueness" refers to the property of being the one and only object satisfying a certain condition. This sort of quantification is known as uniqueness quantification or unique existential quantification, and ...

* E, 14 in

hexadecimal In mathematics and computing, the hexadecimal (also base-16 or simply hex) numeral system is a positional numeral system that represents numbers using a radix (base) of 16. Unlike the decimal system representing numbers using 10 symbols, he ...

and other positional numeral systems of a base of 15 or higher *

\operatorname /math> or

Expected value In probability theory, the expected value (also called expectation, expectancy, mathematical expectation, mean, average, or first moment) is a generalization of the weighted average. Informally, the expected value is the arithmetic mean of a ...

, the average expected outcome of a trial in probability theory * , the

complete elliptic integral of the second kind In integral calculus, an elliptic integral is one of a number of related functions defined as the value of certain integrals, which were first studied by Giulio Fagnano and Leonhard Euler (). Their name originates from their originally arising i ...

* , the

identity element In mathematics, an identity element, or neutral element, of a binary operation operating on a set is an element of the set that leaves unchanged every element of the set when the operation is applied. This concept is used in algebraic structures su ...

* , the Erdős–Borwein_constant

Computing and computation

E (complexity) In computational complexity theory, the complexity class E is the set of decision problems that can be solved by a deterministic Turing machine in time 2 O(''n'') and is therefore equal to the complexity class DTIME(2O(''n'')). E, unlike the simil ...

, a set of decision problems solvable by a Turing machine in a specific time *

E (PC DOS) E is the text editor which was made part of PC DOS with version 6.1 in June 1993, in February 1995 with version 7 and later with PC DOS 2000. In version 6.1, IBM dropped QBASIC, which, in its edit mode, was also the system text editor. It was ...

, a text editor *

E (1970s text editor) E is a text editor originally developed at the Stanford AI Lab in the 1970s for the WAITS operating system. E was one of the first WYSIWYG editors. Richard Stallman Richard Matthew Stallman (; born March 16, 1953), also known by his ini ...

, 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) Enlightenment, also known simply as E, is a compositing window manager for the X Window System. Since version 20, Enlightenment is also a Wayland compositor. Enlightenment developers have referred to it as "the original eye-candy window manager ...

, a free software open source manager for X Window System *

/e/ (operating system) /e/ (also known as /e/ OS and /e/OS, formerly Eelo) is a fork of LineageOS, an Android-based mobile operating system, and associated online services. /e/ is presented as privacy software that does not contain proprietary Google apps or se ...

, a fork of LineageOS, which in turn is based on Android

Music

E (musical note) E is the third note and the fifth semitone of the C major scale, and mi in fixed-do solfège. It has enharmonic equivalents of F♭ F-flat) which is by definition a diatonic semitone above Eand D (D-double sharp), amongst others. When calcula ...

E major E major (or the key of E) is a major scale based on E, consisting of the pitches E, F, G, A, B, C, and D. Its key signature has four sharps. Its relative minor is C-sharp minor and its parallel minor is E minor. Its enharmonic equiva ...

, a scale *

E minor E minor is a minor scale based on E, consisting of the pitches E, F, G, A, B, C, and D. Its key signature has one sharp. Its relative major is G major and its parallel major is E major. The E natural minor scale is: : Changes needed ...

, 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'' (video), by Eminem * ''E'' (Adrian Belew album), 2009 * ''É'' (album), by Duda Brack, 2015 * ''E'' (Enslaved album), 2017 * ''E'' (Epik High album), 2009 * ''E'' (single album), by Big Bang, 2015 * ''E'', a 2019 album by

Ecco2K Zak Arogundade Gaterud, better known by his stage name Ecco2K, is a British-Swedish singer, designer, model, director and member of Drain Gang from Hornstull, Stockholm. Known for his experimental and innovative songwriting as well as his andr ...

* "E", a song by Baboon from ''

Sausage A sausage is a type of meat product usually made from ground meat—often pork, beef, or poultry—along with salt, spices and other flavourings. Other ingredients, such as grains or breadcrumbs may be included as fillers or extenders. ...

'', 1992

Television and film

* E!, Entertainment Television, an American cable and satellite TV network **

E! (Australia) E! is an Australian pay television channel, owned by NBCUniversal International Networks. Much like its American counterpart it features entertainment-related programming, reality television and Hollywood news. It is currently available through t ...

, the Australian version of American E! * E! (Canada): **

E! (Canadian TV system) The first incarnation of E!, also referred to as E! Entertainment Television, was a Canadian English language privately owned television system that existed from 2001 to 2009 under the ownership of Canwest. At its peak it consisted of eight local ...

, 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), a 2006 Tamil 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 ''The Keys of Marinus'' is the fifth serial in the British science fiction television series ''Doctor Who'', which was first broadcast on BBC TV/BBC1 in six weekly parts from 11 April to 16 May 1964. Written by Terry Nation and directed by John ...

Geography

* E or

east East or Orient is one of the four cardinal directions or points of the compass. It is the opposite direction from west and is the direction from which the Sun rises on the Earth. Etymology As in other languages, the word is formed from the fac ...

, one of the four cardinal directions *

E Township, Maine E is an unincorporated township located in Aroostook County, Maine, United States. It is part of the Central Aroostook Unorganized Territory and borders the towns of Blaine to the east and Westfield to the north. As of the 1990 census, when it w ...

, an unincorporated community in USA *

E (state) The State of E (IPA:/ ɤ̂/), whose Middle and Old Chinese name has been reconstructed as Ngak (IPA:/ŋˤak/), was an ancient Chinese state in the area of present-day Henan and Hubei in China from around the 12th century BCE until its overthro ...

, 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 New Brunswick (french: Nouveau-Brunswick, , locally ) is one of the thirteen provinces and territories of Canada. It is one of the three Maritime provinces and one of the four Atlantic provinces. It is the only province with both English and ...

's postal code *

Hubei Hubei (; ; alternately Hupeh) is a landlocked province of the People's Republic of China, and is part of the Central China region. The name of the province means "north of the lake", referring to its position north of Dongting Lake. The p ...

, abbreviated in Chinese as È (鄂), a province of China

Languages

E language E () or Wuse/Wusehua () is a Tai languages, Tai–Chinese language, Chinese mixed language spoken primarily in Rongshui Miao Autonomous County, Guangxi, China. It contains features of both Tai and Chinese varieties, generally adopting Chinese vo ...

, a language of China *

É (temple) É (Cuneiform: ) is the Sumerian word or symbol for house or temple. The Sumerian term É.GAL (𒂍𒃲,"palace", literally "big house") denoted a city's main building. É.LUGAL (𒂍𒈗,"king's house") was used synonymously. In the texts of ...

, Sumerian house or temple * E, the

Spivak pronoun The Spivak pronouns are a set of gender-neutral pronouns in English promulgated on the virtual community '' LambdaMOO'' based on pronouns used in a book by American mathematician Michael Spivak. Though not in widespread use, they have been employ ...

meaning "he" or "she"

Letters and other characters

* Ⓔ or ⓔ or (e) or (E) - circled-E or circled-E, see

Enclosed Alphanumerics Enclosed Alphanumerics is a Unicode block of typographical symbols of an alphanumeric within a circle, a bracket or other not-closed enclosure, or ending in a full stop. It is currently fully allocated. Within the Basic Multilingual Plan ...

* Latin E with diacritic: ** É or é - ''e-acute'', an accented letter of many Latin alphabets. ** È or è - ''e-grave'', another accented letter of many Latin alphabets ** Ê or ê - ''e with circumflex'' ** Ë or ë - ''e with trema'' (diaeresis or umlaut) ** Ē or ē - ''e with macron'' * e, the

close-mid front unrounded vowel The close-mid front unrounded vowel, or high-mid front unrounded vowel, is a type of vowel sound, used in some spoken languages. The symbol in the International Phonetic Alphabet that represents this sound is . For the close-mid front unrounde ...

IPA symbol * Е and е, a letter of the Cyrillic alphabet * Ε and ε, the letter

Epsilon Epsilon (, ; uppercase , lowercase or lunate ; el, έψιλον) is the fifth letter of the Greek alphabet, corresponding phonetically to a mid front unrounded vowel or . In the system of Greek numerals it also has the value five. It was d ...

in the Greek alphabet

People

* E (surname) (), Chinese surname * e, a nickname of

Eric Neustadter Eric Alan Neustadter, also known by his Xbox Live#Gamertag, Xbox Live Gamertag e, is the former Operations Manager for the Microsoft gaming network Xbox Live. Neustadter is frequently a co-host of Larry Hryb, Larry Hryb's "Major Nelson Radio" Xbo ...

, Operations Manager for Xbox Live and frequent co-host of the "Major Nelson Radio" podcast * Mr. E (disambiguation)

Other uses

* ''e'' (novel), a 2000 comic novel by Matt Beaumont *

E band (disambiguation) E band may refer to: * E (band), a Czech experimental rock band * E band (NATO), a radio frequency band from 2 to 3 GHz * E band (waveguide) The waveguide E band is the range of radio frequencies from 60 GHz to 90 GHz in the electromagn ...

* E#, a team's elimination number * E, the slang name for the recreational drug Ecstasy, also called

* E, or the

Elohist According to the documentary hypothesis, the Elohist (or simply E) is one of four source documents underlying the Torah,McDermott, John J., ''Reading the Pentateuch: A Historical Introduction'' (Pauline Press, 2002) p. 21. Via Books.google.com.au ...

, one of the four sources of the Torah * E, or Everyone, a video game rating symbol used by the

Entertainment Software Rating Board The Entertainment Software Rating Board (ESRB) is a self-regulatory organization that assigns age and content ratings to consumer video games in the United States and Canada. The ESRB was established in 1994 by the Entertainment Software Ass ...

which is suitable for all ages. * Dominical letter E for a

common year starting on Wednesday A common year starting on Wednesday is any non-leap year (a year with 365 days) that begins on Wednesday, 1 January, and ends on Wednesday, 31 December. Its dominical letter hence is E. The most recent year of such kind was 2014, and the next one ...

* 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 * '' "E" Is for Evidence'', the fifth novel in Sue Grafton's "Alphabet mystery" series, published in 1988 * E, or Eredivisie, The Symbol Of The

Eredivisie The Eredivisie (; ''"Honour Division"'' or ''"Premier Division"'') is the highest level of professional football in the Netherlands. The league was founded in 1956, two years after the start of professional football in the Netherlands. It is ...

Logo.