Refers to a curved line or shape, often used in geometry, astronomy, or describing curved paths.
The rainbow drew a large arc in the sky.
Please calculate the length of this arc of the circle.
major arc; superior arc
arc
arc-shaped; crescent-shaped
minor arc
The kanji 弧 is composed of 弓 (bow) and 瓜 (melon), suggesting a bow-like curved shape. The reading こ is the on'yomi.