In mathematics, an

**arc**is a part of a circle between two points (also called a

**circle segment**). A minute of arc is an angle measure, being 1/60 of a degree. A second of arc is 1/60 of a minute of arc.

In graph theory, an **arc** is a synonym for an edge.

**Arc** is also a name for a dialect of the Lisp programming language.

See also: Arc lamp, voltaic arc.