appendix

Concise Oxford English Dictionary © 2008 Oxford University Press:
appendix/əˈpendɪks/

▶noun (pl. appendices or appendixes)

• 1 (also vermiform appendix) Anatomy a tube-shaped sac attached to the lower end of the large intestine.

• 2 a section of subsidiary matter at the end of a book.

– origin C16 (in sense 2): from L., from appendere (see append).