WordReference Random House Unabridged Dictionary of American English © 2019
- Mechanical Engineering(on a gear or rack) the radial distance between the pitch circle or line and the root circle or line. Cf. addendum (def. 3a).
- Latin: to be given up, gerund, gerundive of dēdere, equivalent. to dē- de- + -dere combining form of dare to give; see addendum