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copper a chemical element that has twenty-nine protons in each nucleus and occurs as a reddish brown, corrosion-resistant solid metal with excellent electrical conductivity, widely used for wiring and in pipes, and in alloys such as brass and bronze. (symbol: Cu). [1/7 definitions]
crawlspace a low or shallow area, as beneath the roof or floor of a building, usu. containing wiring and plumbing.
rewire to furnish with new wiring.