Hypertext Webster Gateway: "arc"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Arc \Arc\ ([aum]rk), v. i. [imp. & p. p. {Arcked} ([aum]rkt); p.
pr. & vb. n. {Arcking}.] (Elec.)
To form a voltaic arc, as an electrical current in a broken
or disconnected circuit.
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Arc \Arc\, n. [F. arc, L. arcus bow, arc. See {Arch}, n.]
1. (Geom.) A portion of a curved line; as, the arc of a
circle or of an ellipse.
2. A curvature in the shape of a circular arc or an arch; as,
the colored arc (the rainbow); the arc of Hadley's
quadrant.
3. An arch. [Obs.]
Statues and trophies, and triumphal arcs. --Milton.
4. The apparent arc described, above or below the horizon, by
the sun or other celestial body. The diurnal arc is
described during the daytime, the nocturnal arc during the
night.
{Electric arc}, {Voltaic arc}. See under {Voltaic}.
From WordNet (r) 1.7 (wn)
arc
n 1: electrical conduction through a gas in an applied electric
field [syn: {discharge}, {spark}, {electric arc}, {electric
discharge}]
2: a continuous portion of a circle
3: something curved in shape [syn: {bow}]
v : form an arch [syn: {arch}, {curve}]
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