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This is termed non-spuriousness, which simply means ânot false.â A spurious or false relationship exists when what appears to be an association between the two variables is actually caused by a third extraneous variable.
nonferrous metallurgy. A branch of metallurgy that deals with metals other than iron and iron-base alloys. Nonferrous Metallurgy. a branch of heavy industry concerned with the extraction and concentration of ores and the production and processing of nonferrous metals and their alloys (seeMETALLURGY). The by-products of nonferrous metallurgy include chemical compounds, mineral fertilizers, and construction materials.