noun, plural de·den·da [dih-den-duh] /dɪˈdɛn də/. 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 of dedendum
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019