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

Far Eastern War, 1937-1941 A reliable and serviceable review of events in China from July 1937 to December 1941, with maps, documentary appendices and bibliography. —Harold S. Quigley, Foreign Affairs, 29 Oct. 2024

The 165-page public filing included an appendix of sealed evidence that has remained confidential while Chutkan decides whether to release it publicly. —Bart Jansen, USA TODAY, 18 Oct. 2024

Readers can find in the appendix a list identifying these nearly 500 chronically underperforming schools where enrollment has declined substantially. —Michael J. Petrilli, Forbes, 25 Sep. 2024

Humans are bilaterally symmetrical but have a number of asymmetries, for example the location of the heart and appendix. —New Atlas, 14 Oct. 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