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2 definitions found
 for electric arc
From The Collaborative International Dictionary of English v.0.48 :

  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]

From WordNet (r) 3.0 (2006) :

  electric arc
      n 1: electrical conduction through a gas in an applied electric
           field [syn: discharge, spark, arc, electric arc,
           electric discharge]

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