# deciduous

/ˌdɪˈsɪdʒuəs/ (US) · /dɪsˈɪdjuːəs/ (UK) · CEFR C1 · Adjective

Source: https://englishreference.com/word/deciduous
Updated: 2026-05-11

## Definition

describing a tree or bush that loses its leaves every year, usually in the autumn. It can also describe things that fall off naturally, like baby teeth.

For teachers: shedding leaves annually at the end of the growing season. In a broader biological sense, refers to parts that are shed at a particular stage of development, such as primary teeth or antlers.

## Examples

- Oak and maple are common deciduous trees.
- In the autumn, the deciduous forest transforms into a vibrant display of red and gold before the leaves fall.
- The evolutionary advantage of deciduous behavior lies in the plant's ability to conserve water and energy during harsh winter months when photosynthesis would be inefficient.

## Usage notes

- Typically used attributively before a noun like 'forest', 'tree', or 'teeth'.

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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.