Word.ws English Dictionary

Plural of appendix

irregular plural

The plural of appendix is appendices or appendixes.

Forms of appendix

Singularappendix /əˈpɛn.dɪks/
Pluralappendices [əˈpʰɛndɪˌsiz]
appendixes
Countablecountable

Appendices and appendixes in a sentence

  • Here are also various appendices, some less Westcottian, some more so.1907, Macmillan's Magazine, volume 2, page 409. From the entry Westcottian
  • A number of commands have been devised to generically code a publication into its major parts, such as sections, chapters, subchapters, subsubchapters, appendices, subappendices, etc.1990, Michael L. Kleper, The illustrated handbook of desktop publishing and typesetting. From the entry subsubchapter
  • Perhaps the feature which most contributes to making this a valuable reference book is the appendices and indices which are an integral part of the guide.1976, Sidney Heath, The Romance of Symbolism and Its Relation to Church Ornament and Architecture, Gale Research Co., →ISBN, page 98, →ISBN. From the entry indices

Meaning of appendix

  1. noun Something attached to something else; an attachment or accompaniment.
  2. noun A text added to the end of a book or an article, containing additional information.
  3. noun The vermiform appendix.

Full definition of appendix

Nouns ending in -ix: plural -ices

Questions about the plural of appendix

What is the plural of appendix?
The plural of appendix is appendices or appendixes.
Which is correct, appendices or appendixes?
Both are used. appendices is the more common of the two in English writing.
Is appendix countable?
Appendix is a countable noun.

Source and license

Adapted from Wiktionary: appendix (page history and authors) and the entries of its forms. Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws left out forms marked obsolete, archaic, rare or dialectal and added the examples. Wiktionary data of 2026-09-02.

Last updated:

Cite this page: “Plural of appendix.” Word.ws, https://word.ws/plural/appendix. Based on Wiktionary, CC BY-SA 4.0.