vestigial

/vɛˈstɪdʒiəl/
adjective
  1. Relating to a body part or organ that is no longer fully developed or useful, but was present in an earlier stage of evolution.
    • The human appendix is a vestigial organ that no longer helps with digestion.
    • Whales have vestigial hip bones that show they evolved from land animals.
    • Some snakes have vestigial leg bones hidden inside their bodies.
  2. Still existing but very small or not fully developed, like a leftover from something that used to be larger or more important.
    • The company kept a vestigial customer service department, though most support was now online.
    • In the modern city, a vestigial wall from the old fortress still stands in the park.
    • His vestigial sense of duty made him attend the meeting, even though he no longer cared.
What does "vestigial" mean? | whatsthatwordmean | whatsthatwordmean