addendum
addendum Lexical Profile
addendum Game Scores & Validity
• noun
An item of additional material, typically omissions or updates, added at the end of a book, contract, or other document.
"Both parties signed an addendum to the original lease agreement to extend the rental period by six months."
In mechanical engineering, the radial distance from the pitch circle of a gear wheel to the outer tip of a tooth.
"The engineer carefully calculated the addendum and dedendum to ensure the two gears would mesh smoothly without binding."
Word Nuance & Usage
The traditional Latin plural 'addenda' is often used collectively to refer to a section of supplementary notes at the back of a book, though 'addendums' is also widely accepted in modern legal and business writing.
• Rhymes for addendum
Word Origin & Etymology
Borrowed in the late 17th century directly from Latin 'addendum', the neuter gerundive of 'addere' ('to add'), literally meaning 'that which is to be added'.