
1) Deterioration 2) Relapse
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https://www.crosswordclues.com/clue/retrogradation

Retrogradation is the term for the landward change in position of the front of a river delta with time. This occurs when the mass balance of sediment into the delta is such that the volume of incoming sediment is less than the volume of the delta that is lost through subsidence, sea-level rise, and/or erosion. As a result, retrogradation is most c...
Found on
http://en.wikipedia.org/wiki/Retrogradation
[starch] Retrogradation is a reaction that takes place in gelatinized starch when the amylose and amylopectin chains realign themselves, causing the liquid to gel. When native starch is heated and dissolves in water, the crystalline structure of amylose and amylopectin molecules is lost and they hydrate to form a viscous solution. If the vi...
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http://en.wikipedia.org/wiki/Retrogradation_(starch)

• (n.) The act of retrograding, or moving backward. • (n.) The state of being retrograde; decline.
Found on
http://thinkexist.com/dictionary/meaning/retrogradation/

When starch is mixed with water it swells and forms a gel; with time, the starch components will re-crystallise and squeeze the water out of the gel; this phenomenon is known as retrogradation and is responsible for the staling process in bread.
Found on
http://www.encyclo.co.uk/local/22159
Re`tro·gra·da'tion noun [ French
rétrogradation or Latin
retrogradatio . See
Retrograde .]
1. The act of retrograding, or moving backward.
2. The state of being retrograde; decline.
Found on
http://www.encyclo.co.uk/webster/R/69
No exact match found.