ADDENDUM Definition & Meaning

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addendum

[ uh-den-duhm ]

Phonetic (Standard)IPA

noun

plural addenda addendums

a thing to be added; an addition.
an appendix to a book.
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.

addendum

/ əˈ��ɛ�Ի�ə�� /

noun

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

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�y��vlog History and Origins

Origin of addendum¹

First recorded in 1785–95; neuter singular of Latin addendus “that which is to be added,” gerundive of addere “to add”; add

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�y��vlog History and Origins

Origin of addendum¹

C18: from Latin, literally: a thing to be added, neuter gerundive of addere to add

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Example Sentences

Examples have not been reviewed.

In his marvelous history, “Americans and the California Dream,” Kevin Starr wrote that de Monfras made a secret addendum to his report to his government, with this quixotic plan for a Gallic takeover:

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The retired brass and veterans organizations added emotionally charged addenda to that legalistic document.

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But while some hats feel like an addendum to an outfit, others take on more main character energy – as does Melania Trump's today.

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Three "addendums" remain secret and will only be shared with Ukraine's partners, Zelensky said.

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At a public meeting Thursday, many LGBTQ+ park users expressed anger at the parks department and voiced opposition against a proposed addendum to Seattle Parks and Recreation policy that would designate “zones” in the area.

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