retrogression

/ˈrɛtrəˌgrɛʃən/

Other forms: retrogressions

Definitions of retrogression

1. noun

   returning to a former state
   synonyms: regress, regression, retroversion, reversion

   type of:

   reversal

   a change from one state to the opposite state
2. noun

   passing from a more complex to a simpler biological form
   synonyms: degeneration

   types:

   abiotrophy

   a loss of vitality and a degeneration of cells and tissues not due to any apparent injury

   cataplasia

   (biology) degenerative reversion of cells or tissue to a less differentiated or more primitive form

   type of:

   shift, transformation, transmutation

   a qualitative change