Arc

Arc may refer to:

Biology

Arc (protein), a name of product of an immediate early gene, also called Arg3.1
Arc system, a 2-component system found in prokaryotes, used to detect celular redox poise

ARC (file format), a file name extension for archive files
Arc (programming language), a Lisp dialect designed by Paul Graham
arc, the command-line interface for ArcInfo
ARC International, a developer of configurable microprocessor technology now owned by Synopsys
Arc System Works, a video game developer
Automatic Reference Counting, is a memory management enhancement to Objective-C and Swift programming where the burden of keeping track of an object's reference count is lifted from the programmer to the compiler.
Adaptive replacement cache, a memory replacement algorithm for better performance
Google App Runtime for Chrome, a compatibility layer and sandboxing technology to run Android applications on Chromebook computers

Arc or arch, a bowed or curved structure capable of spanning a space while supporting significant weight
Arc chute, a protective device in an electrical circuit breaker
Arc lamp, a device that produces light by an electric arc
Arc welding, a method of welding that uses an electric arc to melt the metals together
Electric arc or voltaic arc, an ongoing plasma discharge (an electric current through a gas), producing light and heat

Arc (geometry), a segment of a differentiable curve
Arc (projective geometry), a particular type of set of points of a projective plane
Arcminute, a measure used for angles, equal to 1⁄60 of a degree
arc (function prefix) (arcus), a prefix for inverse trigonometric functions
A directed edge in graph theory

Infralateral arc, a rare halo, an optical phenomenon appearing similar to a rainbow under a white parhelic circle
Lower tangent arc, rarely observable halo, an optical phenomenon appearing under and tangent to a 22° halo centred on the sun
120° parhelion, relatively rare halo, an optical phenomenon occasionally appearing along with very bright sun dogs
Parry arc, a rare halo, an optical phenomenon which occasionally appears over a 22° halo together with an upper tangent arc
Subhelic arc, a rare halo that curves upwards from the horizon and touches the tricker arc above the anthelic point
Supralateral arc, a rare halo, an optical phenomenon often confused with the indeed infrequently appearing 46° halo
Upper tangent arc, halo, an atmospheric optical phenomenon which appears over and tangent to the 22° halo centred on the sun

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
Island arc, a type of archipelago composed of a chain of volcanoes whose alignment is arc-shaped, and which are situated parallel and close to a boundary between two converging tectonic plates
Les Arcs, a ski resort in the French Alps
Volcanic arc, a chain of volcanoes positioned in an arc shape as seen from above

Aramaic language (ISO 639-2/3 language code), a Semitic language
Arc (Bahá'í), a number of administrative buildings for the Bahá'í Faith, located on Mount Carmel in Israel
Auto Research Center, a automotive and cycling research company in Indianapolis, Indiana USA
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
Joan of Arc (c. 1412–1431), national heroine of France and Catholic saint
Prix de l'Arc de Triomphe, a Group 1 flat horse race
Arc (greyhounds), a major greyhound race in the Greyhound Board of Great Britain calendar
Sony Ericsson Xperia Arc, a cellphone
Arc (film), a 2006 film starring Billy Lush
Atlantic Rally for Cruisers, an annual transatlantic sailing event for cruiser yachts