what is a eutectoid
eutectoid. n. 1. (Chemistry) a mixture of substances similar to a eutectic, but forming two or three constituents from a solid instead of from a melt. adj. 2. (Chemistry) concerned with or suitable for eutectoid mixtures. [C20: from eutect(ic) + -oid]. (yuËtÉk tÉÉªd). adj.