英文字典中文字典51ZiDian.com

The Collaborative International Dictionary of English v.0.48 (gcide)

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.
[Webster 1913 Suppl.]


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.
[1913 Webster]

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.
[1913 Webster]

3. An arch. [Obs.]
[1913 Webster]

Statues and trophies, and triumphal arcs. --Milton.
[1913 Webster]

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.
[1913 Webster]

{Electric arc}, {Voltaic arc}. See under {Voltaic}.
[1913 Webster]