arc

nouns

electrical conduction through a gas in an applied electric field
arc, discharge, electric arc, electric discharge, spark
a continuous portion of a circle
arc
is derived from
arcuate
is a part of
ellipse in which the two axes are of equal length; a plane curve generated by one point moving at a constant distance from a fixed point
"he calculated the circumference of the circle"
circle
is a part of
a plane figure bounded by two radii and the included arc of a circle
sector
is a type of (narrower)
the trace of a point whose direction of motion changes
curve, curved shape
something curved in shape
arc, bow

verbs

form an arch or curve
"her back arches"; "her hips curve nicely"
arc, arch, curve