Learner's definition of APPENDIX
1 pluralappendixes; orappendices/-dɪˌsiːz//əˈpɛndɪˌsiːz/: a section of extra information added at the end of a book
In your textbooks, turn to Appendix 3: Glossary of Terms.
The book has several appendixes/appendices.
pluralappendixes: a small tube at the beginning of the large intestine that can be removed by surgery if it becomes infected