# appendage

/əˈpɛndɪdʒ/ (US) · /ɐpˈɛndɪdʒ/ (UK) · CEFR C1 · Noun

Source: https://englishreference.com/word/appendage
Updated: 2026-05-27

## Definition

a part of a body that is attached to the main part, like an arm or a leg. It can also mean something extra that is added to a main object, like a small room or a note at the end of a book.

For teachers: a part of an organism that is attached to the body but is not part of the main trunk; also, a supplementary part or feature added to a primary object. Often used in biological contexts to describe limbs or in technical contexts to describe supplementary structures.

## Examples

- The insect has several long appendages for moving.
- The architect designed a small glass appendage to the main house to serve as a sunroom.
- While the primary structure of the molecule is stable, the presence of a reactive appendage allows it to bind more effectively to the target protein during the chemical reaction.

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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.