eutectic alloy

Any combination of metals the melting point of which is lower than that of any of the individual metals of which it consists. An alloy in which the components are mutually soluble in the solid state. A eutectic alloy has a nonhomogeneous grain structure and is therefore likely to be brittle and subject to tarnishing and corrosion.

An alloy that is generally brittle, easily melted, and subject to tarnish and corrosion, used primarily in dental solders.