Appendix

As a Noun

1. A section added at the end of a book or document containing extra information.
2. A small, tube-shaped organ attached to the large intestine in the human body, with no essential function.
3. An additional part attached to something larger.

Word History

The word appendix comes from the Latin appendere, meaning “to hang upon” or “attach.” It entered English in the 16th century, initially referring to supplementary material in texts and later to the anatomical structure in the body.

Examples

1. The book includes an appendix with additional references.
2. He had to undergo surgery to remove his inflamed appendix.
3. The contract had an appendix detailing the payment terms.

Synonyms

Supplement, addendum, attachment, annex (For documents)
Vestigial organ (For anatomy)

Related Words

Addition, extension, extra section (For documents)
Organ, intestine, abdominal part (For anatomy)

Antonyms

Main text, core section (For documents)
Essential organ (For anatomy)