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 GreeceBack-arc basin, a subsided region caused by back-arc extensionBack-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 (browser), a freeware browser developed by The Browser Company
Arc (programming language), a Lisp dialect designed by Paul Graham
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

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
The Arcs, an American garage rock band formed by Dan Auerbach in 2015
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

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 639-2 and -5 language code of the Aramaic language, a Semitic language
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 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
Les Arcs, a ski resort in the French Alps
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

See also
Joan of Arc (c. 1412–1431), national heroine of France and Catholic saint
ARC (disambiguation)
Arc Angel (disambiguation)
Arc reactor (disambiguation)
Arch (disambiguation)
Arch of Triumph (disambiguation)
Ark (disambiguation)