i Register
In some senses, appendix is marked as obsolete. Watch for register when choosing this word.
noun
Something attached to something else; an attachment or accompaniment.
Near-synonyms: ancillary, auxiliary
idleness is an appendix to nobility; they count it a disgrace to work, and spend all their days in sports, recreations, and pastimes […]
A text added to the end of a book or an article, containing additional information.
Holonym: back matter
Near-synonyms: supplement (sometimes synonymous), addendum, codicil
The vermiform appendix.
Any process, prolongation, or projection.