What does amalgamation mean?
The definition of amalgamation
A*mal`ga*ma”tion, n.
Etym: [Cf. F. amalgamation.]

1 The act or operation of compounding mercury with another metal; — applied particularly to the process of separating gold and silver from their ores by mixing them with mercury. Ure.
2 The mixing or blending of different elements, races, societies, etc.; also, the result of such combination or blending; a homogeneous union. Macaulay.