dedendum

de·den·dum

[dih-den-duhm]
noun, plural de·den·da [dih-den-duh] . Machinery.
(on a gear or rack) the radial distance between the pitch circle or line and the root circle or line. Compare addendum ( def 3a ).

Origin:
1900–05; < Latin: to be given up, gerund of dēdere, equivalent to dē- de- + -dere combining form of dare to give; see addendum

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Dedendum is always a great word to know.
So is bezoar. Does it mean:
a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes.
a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.
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