English
retrogradation
From retrograde + -ation.
A compound of retrograde + -ation
Proto-Indo-European *gʰredʰ-
Latin retrōgradus ‘of a celestial object: appearing to move…’
Middle French retrograde
Middle English retrograd
English retrograde
Today it means
noun Motion in a retrograde manner.
Language periods are conventional ranges, not dates for this word.
Etymograph / retrogradation