eutectic
eutectic (ū*tek"tik) , adjective
[Greek e'y`thktos easily melted; e'y^ well + th`kein to melt.]
(Physics) Of maximum fusibility; -- said of an alloy or mixture which has the lowest melting point which it is possible to obtain by the combination of the given components.
eutectic (ū*tek"tik) , noun
a mixture of substances having a composition providing the minimum melting point for mixtures of those substances. Called also a eutectic mixture.