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单词 addendum
释义

WordReference Random House Learner's Dictionary of American English © 2024
ad•den•dum /əˈdɛndəm/USA pronunciation   n. [countable], pl. -da (-də).
  1. something added;
    esp., a section added to a book.

WordReference Random House Unabridged Dictionary of American English © 2024
ad•den•dum  (ə dendəm),USA pronunciation n., pl. -da (-də)USA pronunciation for 1, 2;
-dums for 3.
  1. a thing to be added;
    an addition.
  2. an appendix to a book.
  3. Mechanical Engineering[Mach.]
    • the radial distance between the tip of a gear tooth and the pitch circle of a gear or the pitch line of a rack. Cf. dedendum.
    • Also called addendum circle. an imaginary circle touching the tips of the teeth on a gear.
  • neuter singular of Latin addendus to be added, gerundive of addere to add 1785–95

Collins Concise English Dictionary © HarperCollins Publishers::
addendum /əˈdɛndəm/ n ( pl -da / -də/)
  1. something added; an addition
  2. a supplement or appendix to a book, magazine, etc
Etymology: 18th Century: from Latin, literally: a thing to be added, neuter gerundive of addere to add
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