IPA: /ˌrɛtrəʊˈɡreɪdəʃən/
KK: /rɛtrəˈɡreɪʃən/
A process where certain substances, like starch, change structure and can lead to a decline or backward movement.
The retrogradation of the starch caused the bread to become stale after a few days.
Retrogradation → It is formed from "retro-" (meaning backward) and "gradatio" (from Latin "gradus", meaning step or degree). The word describes the act of moving backward or a backward step in progress.
Think of moving 'backward' ('retro-') as taking a 'step' ('gradus') back in progress — that's what retrogradation means.