Definition of macrosegregation in US English:

macrosegregation

noun

Metallurgy
  • Large-scale variation in the composition of a casting or ingot caused by the gradual separation (especially from the surface to the centre) of the different constituents of the molten alloy as it solidifies.

Origin

1960s.

Pronunciation

macrosegregation

/ˌmakrə(ʊ)sɛɡrɪˈɡeɪʃn/