What is the meaning of Vestigial?

Of or pertaining to a vestige or remnant; like a trace from the past.

Not fully developed in mature animals.

Of a vestigial structure; that has lost all or most of its original function in the course of evolution.

A small, degenerate, or imperfectly developed part or organ which has been more fully developed in some past generation.

Source: wiktionary.org

See also