Children's, Intermediate and Advanced Online English Dictionary & Thesaurus

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arc furnace an electric furnace in which heat is produced by an arc formed between the material being heated and an electrode, or between two electrodes.
arc lamp a lamp, such as a searchlight, in which light is produced by an electric arc passing through a gas between two hot electrodes; arc light.
arc welding a method of welding in which the extreme heat of an electric arc is used.
Saint Joan of Arc a French military heroine and martyr (b.1412?--d.1431).