Anthropology question: What do you call limbs, organs or other physical features that have become obsolete?

Question

Like an obsolete tail for example, or the appendix in humans.

Answer 1

vestigial

Answer 2

Old age.

Answer 3

As an anthropologist myself, I can tell you those are called "vestigial" organs and limbs.

Answer 4

Vestigial.

Answer 5

According to The American Heritage Science Dictionary, the term would be "vestigial":

"Relating to a body part that has become small and lost its use because of evolutionary change. Whales, for example, have small bones located in the muscles of their body walls that are vestigial bones of hips and hind limbs."

Answer 6

"vestigial"

or "non-adaptive features"

and definitely "archaic"