1
plural appendixes or appendices
-dɪˌsiːz 
: a section of extra information added at the end of a book
: 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.
2
plural appendixes
: a small tube at the beginning of the large intestine that can be removed by surgery if it becomes infected
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“Appendix.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/appendix. Accessed 15 Jun. 2026.
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