Definition of addendum in English:


Line breaks: ad¦den|dum
Pronunciation: /əˈdɛndəm

noun (plural addenda /-də/)

  • 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.


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

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