Definition of base metal
1 : a metal or alloy (such as zinc, lead, or brass) of comparatively low value and relatively inferior in certain properties (such as resistance to corrosion) —opposed to noble metal
2 : the metal to which a coating or plating is applied : the metal existing underneath a coating or plating
3 : the chief constituent of any alloy
4 : the metal composing parts to be welded
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Origin and Etymology of base metal
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