appendix

noun

ap·​pen·​dix ə-ˈpen-diks 

plural appendixes or appendices ə-ˈpen-də-ˌsēz 

1

a

: appendage

b

: supplementary material usually attached at the end of a piece of writing

The book's appendix includes a bibliography.

2

: a bodily outgrowth or process

specifically : vermiform appendix

Synonyms

• addendum
• afterword
• codicil
• excursus
• supplement

Examples of appendix in a Sentence

In your textbooks, turn to Appendix 3: Glossary of Terms.

The book has several appendixes.

Recent Examples on the Web

Sarg died in 1942 from complications from a ruptured appendix. —Yaakov Katz, Newsweek, 27 Nov. 2024

On this day in 1922: Fascist leader Benito Mussolini was sworn in as prime minister of Italy by King Victor Emmanuel III. 1926: Magician and escape artist Harry Houdini, aka Erik Weisz, died of peritonitis from a ruptured appendix in Detroit. —Lorenzino Estrada, The Arizona Republic, 31 Oct. 2024

According to the Yale University Press, the famed illusionist and escape artist died of a ruptured appendix. —Emily Blackwood, People.com, 31 Oct. 2024

An appendix at the end of the Binarly report lists all products known to have used that key or any of the other test keys. —Dan Goodin, Ars Technica, 25 July 2024

Word History

Etymology

Latin appendic-, appendix, from appendere — see append

First Known Use

1542, in the meaning defined at sense 1a

Phrases Containing appendix

• vermiform appendix

Kids Definition

appendix

noun

ap·​pen·​dix ə-ˈpen-diks 

plural appendixes or appendices -də-ˌsēz 

1

: additional material attached at the end of a piece of writing

2

: a small tube that is closed at one end and projects from the pouch marking the beginning of the large intestine in the lower right side of the abdomen

Medical Definition

appendix

noun

ap·​pen·​dix ə-ˈpen-diks 

plural appendixes or appendices -də-ˌsēz 

: a bodily outgrowth or process

specifically : vermiform appendix