VESTIGIAL

[adjective] [not gradable]Although the central government has some vestigial (= a small amount of) authority, power has largely passed to the individual states.(specialized) Vestigial can also be used to refer to something, esp. a part of the body, that has not developed completely, or has stopped being used and has almost disappeared.a vestigial organa vestigial limba vestigial taila vestigial languageAn ostrich has vestigial wings.