Definition of mixonephrium in US English:

mixonephrium

noun

Zoology
rare
  • = mixonephridium.

Origin

1950s. From mixo- + nephro- + -ium, as alteration of mixonephridium.

Pronunciation

mixonephrium

/ˌmɪksə(ʊ)ˈnɛfrɪəm/