ARC

noun

1. That part of a circle which a heavenly body appears to pass through as it moves above and below the horizon.
2. A continuous part of the circumference of a circle (circular arc) or of another curve.
3. A curve, in general.

verb

1. To move following a curved path.
2. To shape into an arc; to hold in the form of an arc.
3. To form an electrical arc.