# Arc

Arc may refer to:

## Mathematics

* Arc (geometry), a segment of a differentiable curve
** Circular arc, a segment of a circle
* Arc (topology), a segment of a path
* Arc length, the distance between two points along a section of a curve
* Arc (projective geometry), a particular type of set of points of a projective plane
* arc (function prefix) (arcus), a prefix for inverse trigonometric functions
* Directed arc, a directed edge in graph theory
* Minute and second of arc, a unit of angular measurement equal to 1/60 of one degree.
* Wild arc, a concept from geometric topology

## Science and technology
### Geology

* Arc, in geology a mountain chain configured as an arc due to a common orogeny along a plate margin or the effect of back-arc extension
** Hellenic arc, the arc of islands positioned over the Hellenic Trench in the Aegean Sea off Greece
* Back-arc basin, a subsided region caused by back-arc extension
* Back-arc region, the region created by back-arc extension, containing all the basins, faults, and volcanoes generated by the extension
* Island arc, an arc-shaped archipelago, usually so configured for geologic causes, such as sea-floor spreading, common orogeny on the margin of the same plate, or back-arc extension
** Northeastern Japan Arc, an island arc
** Banda Arc, a set of island arcs in Indonesia
* Continental arc, in geology a continental mountain chain or parallel alignment of chains (as opposed to island arcs), configured in an arc
** Eastern Arc Mountains, a continental arc of Africa
* Volcanic arc, a chain of volcanoes positioned in an arc shape as seen from above
** Aleutian Arc, a large volcanic arc in the U.S. state of Alaska
* Nastapoka arc, a circular coastline in Hudson Bay

### Technology

* arc, the command-line interface for ArcInfo
* ARC (file format), a file name extension for archive files
* ARC (processor), 32-bit RISC architecture
* ARC (adaptive replacement cache), a page replacement algorithm for high-performance filesystems
* Arc (programming language), a Lisp dialect designed by Paul Graham
* Arc (web browser), a freeware web browser developed by The Browser Company
* Sony Ericsson Xperia Arc, a cellphone
* Audio Return Channel, an audio technology working over HDMI
* Authenticated Received Chain, an email authentication system
* Arc lamp, a lamp that produces light by an electric arc
** Xenon arc lamp, a highly specialized type of gas discharge lamp
** Deuterium arc lamp, a low-pressure gas-discharge light source
** Hydrargyrum medium-arc iodide lamp, the trademark name of Osram's brand of metal-halide gas discharge medium arc-length lamp
* Electric arc furnace, a furnace that heats charged material by means of an electric arc
* Arc welding, a welding process that is used to join metal to metal
* Arc-fault circuit interrupter, a specialized circuit breaker
* Arc converter, a spark transmitter
* Intel Arc, brand of graphics processing units designed by Intel
* Arc, one side (half) of an arch

### Other science

* Electric arc, an ongoing plasma discharge (an electric current through a gas), producing light and heat
* Arc flash, the light and heat produced as part of an arc fault
* Arc (protein), a name of product of an immediate early gene, also called Arg3.1
* Reflex arc, a neural pathway that controls a reflex
* Circumhorizontal arc, an optical phenomenon
* Circumzenithal arc, an optical phenomenon

## Arts and entertainment
### Music

* A.R.C. (album), by pianist Chick Corea with bassist David Holland and drummer Barry Altschul recorded in 1971
* Arc (Neil Young & Crazy Horse album), 1991
* Arc (Everything Everything album), 2013
* Arc (EP), a 2016 EP by Agoraphobic Nosebleed
* "Arc", a song by Pearl Jam from Riot Act

### Video games

* Arc System Works, a video game developer
* Luminous Arc, a video game series
* The title character of Arc the Lad, a series of role-playing video games for the PlayStation and PlayStation 2
* Armored Response Coalition, a fictional military/resistance organization seen in the 2020 video game Doom Eternal

### Other arts and entertainment

* Tilted Arc, a controversial public art installation by Richard Serra
* Arc Poetry Magazine, a Canadian literary journal
* Character arc, the status of a character as it unfolds throughout the story
* Story arc, an extended or continuing storyline
* Arcs, one of the twelve basic principles of animation
* Ultraman Arc, a 2024 Japanese television series produced by Tsubuyara Productions and TV Tokyo

## Codes

* Arcata Transit Center, Amtrak code for the station in Arcata, California
* IATA airport code of Arctic Village Airport, a public use airport in Alaska
* ISO 639-3 language code of the Official Aramaic language, spoken between 700 BCE and 300 BCE

## Companies and organizations

* Arc Infrastructure, an Australian railway company
* Arc Institute, an American biomedical research organization
* Arc International, a French manufacturer and distributor of household goods
* Arc Publications, a UK independent publisher of poetry
* Arc @ UNSW, the principal student organisation at the University of New South Wales
* Arc of the United States, a charitable organization serving people with intellectual and developmental disabilities
* Arc Holdings, a French manufacturer of household goods

## Places

* Arc (Provence), a river of southern France, flowing into the Étang de Berre
* Arc (Savoie), a river of eastern France, tributary of the Isère river
* Arc, short for "Arcade"; a Street suffix as used in the US

## Other uses

* Arc (Bahá'í), a number of administrative buildings for the Bahá'í Faith, located on Mount Carmel in Israel
* Arc (greyhounds), a major greyhound race in the Greyhound Board of Great Britain calendar