A eutectic system (/juːˈtɛktɪk/ yoo-TEK-tik) from the Greek 'εύ' (eu = well) and 'τήξις' (tēxis = melting) is a homogeneous mixture of substances that melts or solidifies at a single temperature that is lower than the melting point of either of the constituents. A eutectic system (/juːˈtɛktɪk/ yoo-TEK-tik) from the Greek 'εύ' (eu = well) and 'τήξις' (tēxis = melting) is a homogeneous mixture of substances that melts or solidifies at a single temperature that is lower than the melting point of either of the constituents.