# appendix

/əˈpɛndɪks/ (US) · /ɐpˈɛndɪks/ (UK)

Source: https://englishreference.com/word/appendix
Updated: 2026-06-20

## Senses

### 1. book section

noun · CEFR B2

a section at the end of a book or report that gives extra details or data.

For teachers: a collection of supplementary material at the end of a book, article, or document. Countable; often contains charts, tables, or raw data.

- You can find the full list of survey questions in the appendix at the back of the book.
- The researcher included the raw statistical data in the appendix to allow other scholars to verify the study's findings independently.

### 2. body part

noun · CEFR B2

a small, tube-shaped part of your body attached to your large intestine.

For teachers: the vermiform appendix; a small, blind-ended tube connected to the cecum of the large intestine.

- He had to go to the hospital to have his appendix removed.
- The patient presented with acute abdominal pain, leading the surgeon to suspect an inflamed appendix that required immediate removal.

### 3. general attachment

noun · CEFR C2 · Technical · Formal

something small that is attached to a larger thing.

For teachers: a subsidiary or supplementary part attached to a main body or structure. Often used in technical or biological contexts to describe a projection.

- The small metal appendix on the machine helps to keep the paper straight.
- The biologist noted a small fleshy appendix protruding from the specimen's primary limb, which appeared to serve no locomotive function.

## Examples

- The doctor removed his appendix during surgery.
- Although the appendix was once thought to be a useless evolutionary remnant, recent research suggests it may serve as a safe house for beneficial gut bacteria.

---

From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.