- a thing to be added; an addition.
- an appendix to a book.
- the radial distance between the tip of a gear tooth and the pitch circle of a gear or the pitch line of a rack.Compare dedendum.
- Also called addendum circle.an imaginary circle touching the tips of the teeth on a gear.
Origin of addendum
Examples from the Web for addendum
When Sisley released a photo of the addendum, taken by a friend in the legislature, reporters flooded Biggs with questions.Why Did America’s Only Pot Researcher Suddenly Get Fired?
July 10, 2014
Hopefully you could include it as an addendum if not actually include it within the article itself.Renounced Racist Derek Black Speaks Out
July 30, 2013
That felt like cheating, I imagined my own reaction to reading a book and then finding such an addendum at the end.Speak, Faulty Memory: Why Memoir Writing Is Harder Than You Think
April 3, 2013
Mike Brown had noted that the names of the women who were pregnant have an addendum, “and her unborn child.”The Sept. 11 Survivor Tree in Bloom
March 24, 2012
An addendum to this story comes from the aforementioned “best friend” decorator, John Wiltgen.The Real Grifter of Beverly Hills
September 15, 2011
Natalenko re-read the addendum, pursed his thick lips and sighed.Lone Star Planet
Henry Beam Piper and John Joseph McGuire
He offered no addendum to the revelation he had made to Kurt.Penny of Top Hill Trail
Belle Kanaris Maniates
It is not an addendum or an excrescence: it is an actual part of the fabric of life itself.Spirit and Music
H. Ernest Hunt
But the addendum—that he didn't cass any fiss—betrayed her inexperience.Somehow Good
William de Morgan
His formidable eye supplied the addendum, "And you leave the room!"The Prodigal Father
J. Storer Clouston
- something added; an addition
- a supplement or appendix to a book, magazine, etc
- the radial distance between the major and pitch cylinders of an external screw thread
- the radial distance between the pitch circle and tip of a gear tooth
Word Origin and History for addendum
1794, literally "something added," from Latin addendum, neuter of addendus "that which is to be added," gerundive of addere (see add (v.)). Classical plural form is addenda.