arc
UK: ɑːk | US: ɑːrk
n. a curved line or segment of a circle
n. a luminous electrical discharge between two points (e.g., in welding)
n. a narrative or structural curve in storytelling (e.g., "character arc")
The word "arc" traces back to Latin arcus, meaning "bow" or "curve." This root reflects both physical curvature (e.g., a bow’s shape) and metaphorical extensions (e.g., narrative progression). The term entered Middle English via Old French, retaining its core idea of bending or arching. Its scientific use (e.g., "electric arc") emerged in the 19th century, analogizing the curved path of electrical discharge.
The rainbow formed a perfect arc across the sky.
The welder adjusted the voltage to stabilize the electric arc.
Her character’s emotional arc was the highlight of the novel.
The bridge’s design featured a graceful stone arc.
In geometry, an arc is defined by its central angle and radius.