The Collaborative International Dictionary of English v.0.48:
Appendix \Ap*pen"dix\, n.; pl. E. Appendixes, L. Appendices.
[L. appendix, -dicis, fr. appendere. See Append.]
1. Something appended or added; an appendage, adjunct, or
Normandy became an appendix to England. --Sir M.
2. Any literary matter added to a book, but not necessarily
essential to its completeness, and thus distinguished from
supplement, which is intended to supply deficiencies and
3. (Anatomy) The vermiform appendix.
[Webster 1913 Suppl.]
Syn: See Supplement.