Definition of retropulsion in US English:

retropulsion

noun

Medicine
  • 1The action of pushing something backwards; an instance of this.

  • 2A tendency to walk backwards involuntarily or in an uncontrolled manner, occurring in parkinsonism.

Origin

Mid 18th century (in an earlier sense). From retro- + pulsion, in sense 1 after post-classical Latin retropulsio, in sense 2 after French rétropulsion.

Pronunciation

retropulsion

/ˌrɛtrə(ʊ)ˈpʌlʃn/