Carbon-arc
an electric arc between two carbon electrodes, used mainly for lighting, as in an arc light for a motion-picture projector, or for intense heating, as in the cutting and welding of metals.
Historical Examples
After many experiments with platinum, he abandoned that material in favor of the carbon-arc in vacuo.
Notable Events of the Nineteenth Century Various
noun
an electric arc produced between two carbon electrodes, formerly used as a light source
(as modifier): carbon-arc light
an electric arc produced between a carbon electrode and material to be welded
(as modifier): carbon-arc welding
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