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| a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes. |
| a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison. |
| arc welding | |
| —n | |
| a technique in which metal is welded by heat generated by an electric arc struck between two electrodes or between one electrode and the metal workpiece | |
| arc welder | |
| —n | |
arc welding
use of a sustained luminous electrical discharge (arc) as a source of heat for melting the filler metal (welding rod) and the metals being welded. See welding.
Learn more about arc welding with a free trial on Britannica.com.