Definition of addendum in English:

addendum

Syllabification: ad·den·dum
Pronunciation: /əˈdendəm
 
/

noun (plural addenda /-də/, addendums)

1An item of additional material, typically omissions, added at the end of a book or other publication.
More example sentences
  • The cover has changed, the map of Egypt is missing, and additions and corrections have been placed as an addendum on page 205 instead of directly in the text.
  • For the articles that appeared in the earlier edition, addenda include the new data that is available; only a handful of the original articles were rewritten.
  • He welcomes any professional updates or addenda to his primer.
Synonyms
appendix, codicil, postscript, afterword, tailpiece, rider, coda, supplement; Lawadhesion; adjunct, appendage, addition, add-on, attachment
2 Engineering The radial distance from the pitch circle of a cogwheel, worm wheel, etc., to the crests of the teeth or ridges. Compare with dedendum.

Origin

late 17th century: Latin, 'that which is to be added', gerundive of addere (see add).

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