Noun appendix has 2 senses
  1. appendix - supplementary material that is collected and appended at the back of a book
    --1 is a kind of
    addendum, supplement, postscript
    --1 has particulars: shirttail; codicil
  2. appendix, vermiform appendix, vermiform process, cecal appendage - a vestigial process that extends from the lower end of the cecum and that resembles a small pouch
    --2 is a kind of process, outgrowth, appendage
    --2 is a part of cecum, caecum, blind gut