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Definition of Base metal
1. Noun. A metal that is common and not considered precious. "Lead, iron, copper, tin, and zinc are base metals" 
Medical Definition of Base metal
1. A metal that is readily oxidised; e.g., iron, copper. (05 Mar 2000)
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1. Noun. A metal that is common and not considered precious. "Lead, iron, copper, tin, and zinc are base metals" 
1. A metal that is readily oxidised; e.g., iron, copper. (05 Mar 2000)