Merriam-Webster Logo
SINCE 1828
Menu
dictionary thesaurus

dedendum

noun
de·den·dum | \də̇ˈdendəm, dēˈ-\
plural -s

Definition of dedendum 

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

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!

History and Etymology for dedendum

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

Keep scrolling for more

Learn More about dedendum

Dictionary Entries near dedendum

dedal

Dedalian

dedans

dedendum

dedendum circle

Dedham

dedicant

Statistics for dedendum

Look-up Popularity

Comments on dedendum

What made you want to look up dedendum? Please tell us where you read or heard it (including the quote, if possible).

Show Comments  Hide Comments 

WORD OF THE DAY

de rigueur

required by fashion, etiquette, or custom

Get Word of the Day daily email!

Test Your Vocabulary

Great Scrabble Words—A Quiz

  • scrabble-tiles-that-read-scrabble-quiz
  • Which of the following Q-without-U words means the number five in cards or dice?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

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

Words at Play

Ask the Editors

Word Games