plural -s
: the root of a gear tooth
also : the distance between the dedendum circle and pitch circle of a gear wheel or rack compare addendum

Word History


Latin, neuter of dedendus, gerundive of dedere to give up, deliver, from de from, away + -dere (from dare to give); from the contrast with the addendum of a gear tooth

Love words?

You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Start your free trial today and get unlimited access to America's largest dictionary, with:

  • More than 250,000 words that aren't in our free dictionary
  • Expanded definitions, etymologies, and usage notes
  • Advanced search features
  • Ad free!

Dictionary Entries Near dedendum

Cite this Entry

“Dedendum.” Dictionary, Merriam-Webster, Accessed 20 May. 2024.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!