E

Look up E, e, or è in Wiktionary, the free dictionary.

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

Medicine and genetics

• E number, 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, an amino acid, glutamate
• E. coli or Escherichia coli, a bacterium commonly found in the lower intestine
• E. coli or Entamoeba coli, a non-pathogenic parasite frequently found in the human intestine
• Vitamin E or Tocopherol, a class of chemical compounds

Physics and engineering

• E-layer or the Kennelly-Heaviside layer, part of the ionosphere
• E or Young's modulus, a measure of stiffness in solid mechanics
• E, the symbol for energy in equations concerning mass-energy equivalence
• E, the symbol for an electric field
• e (or e^-) or electron, a fundamental subatomic particle
• e or elementary charge, the electric charge carried by a single proton
• 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 in colour printing
• E°, the Standard electrode potential

Mathematics and logic

• e (mathematical constant), also known as Euler's number and Napier's constant, a transcendental number and the base of natural logarithms, approximately equal to 2.7
• E notation or scientific notation, a way of writing very large, and very small, numbers
• E, 14 in hexadecimal and other positional numeral system
• E or Expected value, the average expected outcome of a trial in probability theory
• E or exa-, the SI prefix for 10¹⁸
• ∃ (a backwards E) or existential quantification, the symbol for "there exists...", in predicate logic
• e, 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 (programming language), an object-oriented programming language
• e (verification language) hardware verification language
• e (text editor), a Windows text editor
• e-mail or electronic mail, mail sent over the internet
• e-commerce or electronic commerce, buying and selling over the internet
• E equational theorem prover, a modern, high performance prove for first-order logic
• Amiga E, a programming language
• E or Enlightenment (window manager), a free software open source manager for X Window System

Music

• E (musical note), the third note of the C major scale
• E major, the scale and key
• E minor, the scale and key
• E, the stage name of Mark Oliver Everett, lead singer, guitarist, keyboardist and sometime drummer of the rock band Eels
• (e), an album from Korean hip-hop group Epik High

Modern culture

• E!, Entertainment Television, an American cable and satellite TV network
• E! (Canada), a Canadian television system
• E (film), a 2005 Tamil film
• E/The Environmental Magazine, a bi-monthly magazine and website
• e (novel), a 2000 comic novel by Matt Beaumont
• E or Edna Mode, a character from the movie The Incredibles
• E or the Elohist, one of the four sources of the Torah
• E or Eric Murphy, a character in the television series Entourage
• E or Mark Oliver Everett, solo artist then lead guitarist for the rock band Eels
• E or everyone, an ESRB video gaming rating symbol
• e or Eric Neustadter, Operations Manager for Xbox Live and frequent co-host of "Major Nelson Radio" podcast

Transport and commerce

• E (New York City Subway service), a rapid transit service
• E class, various vehicle self-promoted classifications
• E, international licence plate coding for Spain
• E, a Polish electric locomotive in PKP classification system
• E or €, the symbol for the European currency unit, the euro
• E or Eni, an Italian oil and gas company
• ℮, the estimated sign, an EU symbol indicating that the weight or volume of the goods is within specific allowable tolerances

Geography

• E Township, Maine, an unincorporated community in USA
• E or east, one of the four cardinal directions
• E, East London, England's postal code
• 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

Other usage

• E band, a range of radio frequencies used by NATO
• E#, a team's elimination number
• E, another name for the recreational drug Ecstasy (Methylenedioxymethamphetamine)

This disambiguation page lists articles associated with the same Latin letter. If an internal link led you here, you may wish to change the link to point directly to the intended article.