Definition of mixis in US English:

mixis

noun

Biology
  • The fusion of gametes; sexual reproduction involving the fusion of gametes.

Origin

1940s; earliest use found in Hereditas. From German Mixis from ancient Greek μίξις mixing, (sexual) intercourse, after German Apomixis apomixis.

Pronunciation

mixis

/ˈmɪksɪs/