1. A fusible alloy used to unite edges or surfaces of two pieces of metal of higher melting point; hard solders, usually containing gold or silver as their main constituent, are usually used in dentistry to connect noble metal alloys. 2. To join two pieces of metal with such an alloy. [L. solido, to make solid, through Fr., various forms]
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sold·er (sodґər) [L. solidatio making solid, fastening] 1. a fusible metal or alloy of metals used to unite pieces of metals with higher fusion temperatures. 2. to fasten together pieces of metal through the use of this material.Medical dictionary. 2011.