Eutectic (Eutectoid)

1. An isothermal reversible reaction in which a liquid solution is converted into two or more intimately mixed solids on cooling, the number of solids formed being the same as the number of components in the system.
2. An alloy having the composition indicated by the eutectic/eutectoid point on an equilibrium diagram.
3. An alloy structure of intermixed solid constituents formed by a eutectic/eutectoid reaction.

See also: Eutectic Alloy, Hypereutectic Alloy, Hypoeutectic Alloy.