OBSOLETISM
Meaning of OBSOLETISM in English
ˈ ̷ ̷ ̷ ̷ˌlēd.ˌizəm noun
( -s )
1. : something (as a custom or a word) that is obsolete
2. : obsoleteness
Webster's New International English Dictionary.
Новый международный словарь английского языка Webster.
2012