appendix

noun4

1. •
   A text added to the end of a book or an article, containing additional information.
2. •
   The vermiform appendix.
3. •
   Any process, prolongation, or projection.
4. •
   (no longer used) Something attached to something else; an attachment or accompaniment.

   • idleness is an appendix to nobility; they count it a disgrace to work, and spend all their days in sports, recreations, and pastimes […] — 2001