addendum
/əˈdɛndəm
/noun (plural addenda /əˈdɛndə/)
1An item of additional material added at the end of a book or other publication.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, accompaniment;
adjunct, appendage, addition, add-on, attachment, extension
rare postlude, subscript, allonge
2 Engineering The radial distance from the pitch circle of a cogwheel or wormwheel 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).