ap·pen·dix 
/əˈpɛndɪks/ noun
/əˈpɛndɪks/ noun [count] 1 plural ap·pen·dix·es or ap·pen·di·ces : 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 ap·pen·dixes : a small tube at the beginning of the large intestine that can be removed by surgery if it becomes infected — see picture at human
▪ In your textbooks, turn to Appendix 3: Glossary of Terms. ▪ The book has several appendixes/appendices.
