DEGRESSION
Etymology 1
Noun
degression (countable and uncountable, plural degressions)
(obsolete) Descent, the act of descending.
(economics) Degressive taxation, a system of progressive decreases in a rate of taxation (as tariffs etc.) below certain benchmarks.
(publishing) Degressive description, a system of varying descriptions of a book in accordance to its importance or available space.
Hypernyms
• (taxation): graduation
Etymology 2
Noun
degression (plural degressions)
Obsolete spelling of digression.
Source: Wiktionary