Webster’s Revised Unabridged Dictionary · 1913
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 concomitant.
Normandy became an appendix to England. Sir M. Hale.
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 correct inaccuracies.
Syn. — See Supplement.