dissimilation

noun4

1. •
   The act of dissimilating, of making dissimilar.
2. •
   A phenomenon where one of a pair of similar adjacent consonant or vowel sounds in a word becomes less similar.

   • Brimstone is "properly" *brinstone, displaying an ancient careless pronunciation made respectable by being called "dissimilation". — 1985
3. •
   The rejection, by a minority group, of the customs and attitudes of the dominant culture.

   • After the impacts of the former Russian Empire and Soviet Union's cultural imperialism on the national identity of indigenous peoples: their language, culture and historical memory, there have been efforts at the dissimilatory process of derussification.
4. •
   A dissimilatory process that supply a cell with energy only without the assimilation of nutrients.