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See also: Appendix
For Wiktionary's appendices, see Appendix:Contents


English Wikipedia has an article on:
Intestinal tract, with the vermiform appendix highlighted.


Borrowed from Latin appendix.


  • (UK, US) IPA(key): /əˈpɛn.dɪks/
  • (file)


appendix (plural appendices or appendixes)

  1. (obsolete in general sense) Something attached to something else; an attachment or accompaniment.
    • 1621, Democritus Junior [pseudonym; Robert Burton], The Anatomy of Melancholy, Oxford: Printed by Iohn Lichfield and Iames Short, for Henry Cripps, OCLC 216894069; The Anatomy of Melancholy: [], 2nd corrected and augmented edition, Oxford: Printed by John Lichfield and James Short, for Henry Cripps, 1624, OCLC 54573970, (please specify |partition=1, 2, or 3):
      , vol.I, New York 2001, p.244:
      idleness is an appendix to nobility; they count it a disgrace to work, and spend all their days in sports, recreations, and pastimes []
  2. Specifically, a text added to the end of a book or an article, containing additional information.
  3. (anatomy) The vermiform appendix, an inner organ that can become inflamed.

Usage notes[edit]

Both plural forms are found in various major dictionaries:

Dictionary or usage guide Entry Notes
Merriam-Webster Unabridged online "appendixes or appendices" No other qualification
Merriam-Webster’s Collegiate Dictionary online "appendixes or appendices" No other qualification
Merriam-Webster’s Medical Dictionary online "appendixes or appendices" No other qualification
Stedman's Medical Dictionary online "appendixes or appendices" No other qualification
Dorland's Illustrated Medical Dictionary, 32nd edition "appendixes or appendices" No other qualification
American Heritage Dictionary of the English Language online "appendices or appendixes" No other qualification
Garner's Modern English Usage, fourth edition "appendixes; appendices" "Both are correct plural forms for appendix, but appendixes is preferable outside scientific contexts […] Nevertheless, the nonnative plural is more frequent [per Google Books Ngram data] by a 3-to-1 margin.", UK subset "appendixes or appendices" "Appendix typically has the plural appendixes in the anatomical sense, and appendices when referring to a part of a book or document."


Derived terms[edit]


The translations below need to be checked and inserted above into the appropriate translation tables, removing any numbers. Numbers do not necessarily match those in definitions. See instructions at Wiktionary:Entry layout#Translations.



From appendō (hang upon).



appendix f (genitive appendicis); third declension

  1. supplement, addition
  2. appendage
  3. barberry (shrub)


Third declension.

Case Singular Plural
Nominative appendix appendicēs
Genitive appendicis appendicum
Dative appendicī appendicibus
Accusative appendicem appendicēs
Ablative appendice appendicibus
Vocative appendix appendicēs

Related terms[edit]