That part of a circle which a heavenly body appears to pass through as it moves above and below the horizon.
A directed edge.
An arclight.
A story arc.
A continuous part of the circumference of a circle (circular arc) or of another curve.
A curve, in general.
A continuous mapping from a real interval (typically [0, 1]) into a space.
A flow of current across an insulating medium; especially a hot, luminous discharge between either two electrodes or as lightning.
A band contained within parallel curves, or something of that shape.
The three-point line.
To shape into an arc; to hold in the form of an arc.
To form an electrical arc.
To move following a curved path.
An abstract sphere of infinite radius which serves as the imaginary backdrop for celestial objects, and of which the visible sky is one hemisphere.
the figure of the universe as an imaginary sphere whose center is the Earth