addendum


addendum

< /əˈdɛn də/ for 1, 2; ad·den·dums for 3.

  1. a thing to be added; an addition.
  2. an appendix to a book.
  3. Machinery.
    1. the radial distance between the tip of a gear tooth and the pitch circle of a gear or the pitch line of a rack.Compare dedendum.
    2. Also called addendum circle.an imaginary circle touching the tips of the teeth on a gear.

noun plural -da (-də)

  1. something added; an addition
  2. a supplement or appendix to a book, magazine, etc
  3. the radial distance between the major and pitch cylinders of an external screw thread
  4. the radial distance between the pitch circle and tip of a gear tooth
n.

1794, literally “something added,” from Latin addendum, neuter of addendus “that which is to be added,” gerundive of addere (see add (v.)). Classical plural form is addenda.

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