amalgamation

Short definition from Wiktionary

Noun

1. 1
   The process of amalgamating; a mixture, merger or consolidation.
2. 2
   The result of amalgamating; a mixture or alloy.
3. 3
   The result of amalgamating; a mixture or alloy: The production of an alloy of mercury and another metal, especially used in antiquity to extract gold and silver from ores.
4. 4
   The intermarriage and interbreeding of different ethnicities or races.