a·mal·gam 
(ə-mălgəm)
(ə-mălgəm)n.
1. Any of various alloys of mercury with other metals, especially:
a. An alloy of mercury and silver used in dental fillings.
b. An alloy of mercury and tin used in silvering mirrors.
2. A combination of diverse elements; a mixture: an amalgam of strength, reputation, and commitment to ethical principles.
[Middle English, from Old French amalgame, from Medieval Latin amalgama, probably ultimately from Greek malagma, soft mass.]