Arc spectrum

a spectrum formed from the light produced by an electric arc, characteristic of the gas or vapor through which the arc passes.


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  • Arc tan

    . arc tangent

  • Arc tangent

    the angle, measured in radians, that has a tangent equal to a given number. Symbol: tan −1. Abbreviation: arc tan; arc tangent The inverse of the tangent function.

  • Arc welding

    welding by means of the heat of an electric arc. Historical Examples One difficulty with arc welding is the lack of skillful operators. Oxy-Acetylene Welding and Cutting Harold P. Manly The same advice applies to arc welding as to the gas flame method but in a lesser degree. Oxy-Acetylene Welding and Cutting Harold P. Manly […]

  • Arca

    a chest for valuables, used in medieval Spain and Italy. Historical Examples From the deep water I fished up some coral, and attached to one fragment was a new species of arca. Narrative of the surveying voyages of His Majesty’s ships Adventure and Beagle, between the years 1826 and 1836 Robert FitzRoy Those of arca […]

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