X is the twenty-fourth letter of the Latin alphabet. Its name in English is ex (/ɛks/).
In phonetics, x is the IPA and X-SAMPA symbol for the voiceless velar fricative (IPA is used for pronunciation throughout this article).
The consonant cluster /ks/ was in Ancient Greece written as Chi 'Χ' (Western Greek) or Xi 'Ξ' (Eastern Greek). In the end, Chi was standardized as Including:
In popular music, X is the name of several albums, including:
1978 X (Klaus Schulze album) by Klaus Schulze
1990 X (INXS album) by INXS
1996 X (The Beloved album) by The Beloved
2000 X (K-Ci and JoJo album) by K-Ci and JoJo
2000 X, the vinyl version of the Rated R (album) by Queens of the Stone Age
2002 X (Def Leppard album) by Def Leppard
2002 X (Joboj album) by Joboj
2002 X (Anna Vissi album) by Anna Vissi
200
X is the name of several bands:
X (US band), a punk rock band featuring Exene Cervenka and John Doe
X (Australian band), a punk rock band featuring Ian Rilen
X Japan, originally named simply "X", a former Visual Kei (J-Rock) band
The X, brilliant experimental punk (?) band, based in the Netherlands
Other related archivesX (Australian band), X (US band), X Japan
X-Factor was a Marvel comic book series, published from 1985 until 1998. X-Factor was one of many spin-offs of the popular X-Men franchise. Like the X-Men, X-Factor was a team of mutant superheroes, born with various superhuman powers who used their abilities to protect a world that hates and fears them.
The first X-Factor consisted of the same members as the original X-Men. In 1991, Marvel unveiled the second X-Factor, initially written by Peter David, a U.S. government-sponsored team that incorporated many seconda ...
The X-Ring is a ring given to senior students of St. Francis Xavier University in Antigonish, Nova Scotia every year on December 3, the feast day of St. Francis Xavier.
X-Ring - History of the X-Ring.
The distinctive StFX X-Ring is presented to the graduating class in a special investiture ceremony which originated in October 1958. The X-Ring was copyrighted in 1957 under the Industrial Designs Act. After several years of debate, the student union that year passed legislation which def ...
!Xóõ is a Khoisan language with a very large number of phonemes, the most of any known language. These include many clicks and vowel phonations.
!Xóõ is spoken in Botswana (mainly) and Namibia by about 4,200 people as of 2002.
!Xóõ language - Relatives.
Until the rediscovery of a few elderly speakers of N/u in the 1990s, !Xóõ was thought to be the last surviving member of the Ta’a-!Kwi language family.
(Note: Ethnologue currently lists ‡Hõã as a relative. This is an error.)< ...
Cover to X-Force Vol. 2 #1 (August 2004). Art by Rob Liefeld.
X-Force was a Marvel Comics superhero team, featured in an eponymous monthly series from 1991 until 2002 and a miniseries running from late 2004 to 2005. It was one of many spin-offs of the popular X-Men franchise.
The first X-Force - the group most commonly associated with the name - grew out of the X-Men's 1980s junior team, the New Mutants. Led by the gun-toting cyborg Cable, X-Force was generall ...
The X-43 is an unmanned experimental hypersonic aircraft design with multiple planned scale variations meant to test different aspects of highly supersonic flight. It is part of NASA's Hyper-X program.
A winged booster rocket with the X-43 itself at the tip, called a "stack", is launched from a carrier plane. After the booster rocket (a modified first stage of the Pegasus rocket) brings the stack to the target speed and altitude, it is discarded, and the ...
The observed X-ray background is thought to result from, at the "soft" end (below 0.3 keV), Galactic X-ray emission (the "galactic" X-ray background), and, at the "hard" end (above 0.3keV), from a combination of many unresolved X-ray sources outside of the Milky Way (the "cosmic" X-ray background).
The X-ray background is occulted by the dark side of the Moon.
The galactic X-ray background is produced largely by emission from hot ...
In cryptography, X.509 is an ITU-T standard for public key infrastructure (PKI). X.509 specifies, amongst other things, standard formats for public key certificates and a certification path validation algorithm.
X.509 - History and usage.
X.509 was initially issued in 1988 and was begun in association with the X.500 standard and assumed a strict hierarchical system of certificate authorities (CAs) for issuing the certificates. This contrasts with web of trust models, like PGP, where anyone (not just special ...
An X-ray microscope uses electromagnetic radiation in the soft X-ray band to produce images of very small objects. Unlike visible light microscopes, X-rays do not reflect or refract easily, and they are invisible to the human eye. Therefore the basic process of an X-ray microscope is to expose film or use a charge-coupled device (CCD) detector to detect X-rays that pass through the specimen, rather than light which bounces off the specimen.
Early X-ray microscopes by Kirkpatrick and Baez used grazing-incidence reflective optics ...
Cover to X-Statix TPB Volume 1. Art by Mike Allred.
Spike
Saint Anna
Fan Boy
Henrietta Hunter
X-Statix was the name of a fictional team of mutant superheroes in Marvel Comics, specifically designed to be ironic media superstars. The team, created by Peter Milligan and Mike Allred, first appeared in X-Force #116, and originally went by the name X-Force.
X-Statix - About the series.
In 2001, the X-Men family of titles were being revamped by th ...
The X-Men
Art by Salvador Larroca.
(See also List of X-Men)
(See also Ultimate X-Men)
The X-Men are a team of comic book superheroes in the Marvel Comics universe. Created by Stan Lee and Jack Kirby, they debuted in X-Men #1 from September 1963, the same month as the premiere of The Avengers.
The X-Men franchise, with its original stories of youthful alienation in which teens literally are the freaks they often figuratively feel like, has grown to become one of the most popular comic books producing dozens of spin-off series over the years and turning some of ...
CVS () [+/-]
In computing, the X Window System (commonly X11 or X) is a windowing system for bitmap displays. It provides the standard toolkit and protocol to build graphical user interfaces on Unix, Unix-like operating systems, and OpenVMS; and almost all modern operating systems support it.
X provides the basic framework for a GUI environment: drawing and moving windows on the screen and interacting with a mouse and keyboard. X does not manda ...
Cygnus X-1 (often abbreviated to Cyg X-1) is an X-ray source in the constellation Cygnus, and considered to be a black hole. It is a high-mass X-ray binary, with the optical counterpart (HDE 226868) being a variable 8.9 magnitude star (visible with good binoculars in good observing conditions.) at right ascension 19 h 56.5 min and declination of 35 deg 4 min (for 1950 epoch).
Tom Bolton identified Cygnus X-1 as a black hole using the facilities of the David ...
A chest X-ray is a radiological film obtained by X-ray taken of the thorax which is used to diagnose problems with that area. Examples of such problems include but are not limited to:
tension pneumothorax
rib fracture
pneumonia
Chest X-Rays are among the most common films taken, being diagnostic of so many important problems.
...
The X-Patents are all the patents issued by the United States Patent and Trademark Office from July 1790 (when the first U.S. patent was issued), to July 1836. The actual number is unknown, but 9,957 is the most accurate estimate. They were burned in a fire, in December 1836, while in temporary storage. No copies or rosters were maintained by the government at the time, leaving only the inventors' copies to reconstruct the collection.
X-Patent - The USPTO and its earliest days.
The Patent Commission of the ...
An x-ray machine is a machine used to produce x-rays via x-ray tubes. These machines are designed to generate man made x-ray photons on demand.
X-ray machine - History.
Hermann von Helmholtz formulated mathematical equations for X-rays. Physicist Johann Hittorf observed tubes with energy rays extending from a negative electrode. William Crookes investigated the effects of energy discharges on rare gases. Heinrich Hertz began experimenting and demonstrated that cathode rays could penetrate very thin metal fo ...
X-ray or Röntgen radiation is a form of electromagnetic radiation with a wavelength in the range of 10 nanometers to 100 picometers (corresponding to frequencies in the range 30 PHz to 3 EHz). X-rays are primarily used for diagnostic medical imaging and crystallography. X-rays are a form of ionizing radiation and as such can be dangerous.
In most languages it is called Röntgen radiation (or an equivalent name) after its discoverer Wilhelm Röntgen.
X-ray - Physics.
X-rays with a wavel ...
