ˈlikwə̇dəs noun
also liquidus curve
( -es )
Etymology: Latin liquidus liquid — more at liquid
: a curve usually on a temperature-composition diagram for a binary system that over a range of temperatures between the melting points of the pure components relates compositions of the liquid phase to the solid phase in equilibrium with the liquid phase and that indicates temperatures above which only the liquid phase can exist — compare solidus , solvus