amalgam

n. alloy, mixture of metals (commonly used in dentistry for fillings)

An amalgam is any mixture or blending of mercury with another metal or with an alloy. Most metals are soluble in mercury, but some (such as iron) are not. Amalgam also may be a solution of metal-like ion complexes, such as ammonium. Amalgams are commonly used in dental fillings.
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Noun
1. an alloy of mercury with another metal (usually silver) used by dentists to fill cavities in teeth; except for iron and platinum all metals dissolve in mercury and chemists refer to the resulting mercury mixtures as amalgams
(synonym) dental amalgam
(hypernym) alloy, metal
2. a combination or blend of diverse things; "his theory is an amalgam of earlier ideas"
(hypernym) combination
(derivation) mix, mingle, commix, unify, amalgamate

n. amalgam, alloy, mixture of metals

(v. t. / i.)
To amalgamate.
  

(n.)
An alloy of mercury with another metal or metals; as, an amalgam of tin, bismuth, etc.
  

(n.)
A native compound of mercury and silver.
  

(n.)
A mixture or compound of different things.