ˌre.trōgrāˈdāshən sometimes ˌrē.t- noun
Etymology: Late Latin retrogradation-, retrogradatio, from Latin retrogradare to retrograde (from retrogradus retrograde) + -ation-, -atio -ation
: the act or process of retrograding: as
a. : regression 3
b. : a step-by-step reexamination of an investigation or argument backward from the conclusion to the first fact or premise
c. : a backward movement : retreat
the retrogradation of a coastline
d. : retrogression 2
e. : reversal of a fluid colloidal solution to an insoluble or gelled state on standing or on cooking — used especially of starch solutions