peritectic
/ˌpɛrɪˈtɛktɪk/Science
adjective
Of, relating to, or designating a reaction that occurs between the solid phase and the liquid phase during the cooling of a mixture, with the formation of a new solid phase.
noun
1A peritectic point or temperature.
2A mixture or alloy that has a peritectic point.
Origin
1920s. From peri- + -tectic, after German peritektisch.