Addendum vs. Alternate — What's the Difference?

An addendum or appendix, in general, is an addition required to be made to a document by its author subsequent to its printing or publication. It comes from the Latin gerundive addendum, plural addenda, "that which is to be added," from addere (lit. ''give toward'', compare with memorandum, agenda, corrigenda).

Occur in turn repeatedly

An item of additional material added at the end of a book or other publication.

Every other; every second

The radial distance from the pitch circle of a cogwheel or wormwheel to the crests of the teeth or ridges.

Another term for alternative

Something added or to be added, especially a supplement to a book.

A person who acts as a deputy or substitute

Something to be added; especially text added as an appendix or supplement to a document.

To occur in a successive manner

A postscript.

To act or proceed by turns

(engineering) The height by which the tooth of a gear projects beyond (outside for external, or inside for internal) the standard pitch circle or pitch line.

To pass back and forth from one state, action, or place to another

A thing to be added; an appendix or addition.

(Electricity) To reverse direction at regular intervals in a circuit.

Textual matter that is added onto a publication; usually at the end

To do or execute by turns.

To cause to alternate

Happening or following in turns; succeeding each other continuously

Designating or relating to every other one of a series

Serving or used in place of another; substitute

Arranged singly at each node, as leaves or buds on different sides of a stem.

Arranged regularly between other parts, as stamens between petals.

A person acting in the place of another; a substitute.

An alternative.

Happening by turns; one following the other in succession of time or place; first one and then the other (repeatedly)

(mathematics) Designating the members in a series, which regularly intervene between the members of another series, as the odd or even numbers of the numerals; every other; every second.

(US) Other; alternative.

Distributed singly at different heights of the stem, and at equal intervals as respects angular divergence

That which alternates with something else; vicissitude.

(US) A substitute; an alternative; one designated to take the place of another, if necessary, in performing some duty.

(mathematics) A proportion derived from another proportion by interchanging the means.

(US) A replacement of equal or greater value or function.

(heraldry) Figures or tinctures that succeed each other by turns.

(transitive) To perform by turns, or in succession; to cause to succeed by turns; to interchange regularly.

(intransitive) To happen, succeed, or act by turns; to follow reciprocally in place or time; followed by with.

(intransitive) To vary by turns.

To perform an alternation (removal of alternate vertices) on (a polytope or tessellation); to remove vertices (from a face or edge) as part of an alternation.

Being or succeeding by turns; one following the other in succession of time or place; by turns first one and then the other; hence, reciprocal.

Designating the members in a series, which regularly intervene between the members of another series, as the odd or even numbers of the numerals; every other; every second; as, the alternate members 1, 3, 5, 7, etc. ; read every alternate line.

Distributed, as leaves, singly at different heights of the stem, and at equal intervals as respects angular divergence.

That which alternates with something else; vicissitude.

A substitute; one designated to take the place of another, if necessary, in performing some duty.

A proportion derived from another proportion by interchanging the means.

To perform by turns, or in succession; to cause to succeed by turns; to interchange regularly.

To happen, succeed, or act by turns; to follow reciprocally in place or time; - followed by with; as, the flood and ebb tides alternate with each other.

To vary by turns; as, the land alternates between rocky hills and sandy plains.

Someone who takes the place of another person

Go back and forth; swing back and forth between two states or conditions

Exchange people temporarily to fulfill certain jobs and functions

Be an understudy or alternate for a role

Reverse (a direction, attitude, or course of action)

Do something in turns;

Every second one of a series;

Allowing a choice;

Occurring by turns; first one and then the other;

Of leaves and branches etc; first on one side and then on the other in two ranks along an axis; not paired;