retropulsion

nounC1

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noun

Plural noun:

retropulsions

1.
(countable, uncountable)(medicine) A tendency to step or walk backwards involuntarily, especially as a symptom of parkinsonism.
2.
(countable, uncountable)(medicine) The pushing or forcing of something to move backwards or inwards.
3.
(countable, obsolete, uncountable)(medicine, obsolete) Transfer of a disease from an external source to an internal organ.