appendix appendix /əˈpɛndɪks/

noun

1. () Supplementary material that is collected and appended at the back of a book  ( appendix )
   supplementary material that is collected and appended at the back of a book
     The appendix of the book contained additional references and resources.
   The appendix of the book contained additional references and resources.
   
2. A vestigial process that extends from the lower end of the cecum and that resembles a small pouch  ( appendix , cecal appendage , vermiform appendix , vermiform process )
   a vestigial process that extends from the lower end of the cecum and that resembles a small pouch
    The appendix is a small, tube-like organ attached to the large intestine
   The appendix is a small, tube-like organ attached to the large intestine