Medical Definition of Vestigial

  • Medical Author:
    William C. Shiel Jr., MD, FACP, FACR

    Dr. Shiel received a Bachelor of Science degree with honors from the University of Notre Dame. There he was involved in research in radiation biology and received the Huisking Scholarship. After graduating from St. Louis University School of Medicine, he completed his Internal Medicine residency and Rheumatology fellowship at the University of California, Irvine. He is board-certified in Internal Medicine and Rheumatology.

Reviewed on 10/30/2018

Vestigial: Referring to a vestige (remnant) or a primitive structure and no longer believed to be important. For example, the appendix is considered a vestigial organ, and some infants are born with vestigial tails.

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Reviewed on 10/30/2018