# eucalyptus

/ˌjukəˈɫɪptəs/ (US) · /jˈuːkɐlˌɪptəs/ (UK) · CEFR B2 · Noun

Source: https://englishreference.com/word/eucalyptus
Updated: 2026-08-15

## Definition

a tall tree with strong-smelling leaves that stay green all year. These trees are originally from Australia, and their oil is often used in medicine or for its fresh scent.

For teachers: an evergreen tree or shrub of the genus Eucalyptus, native to Australasia and widely cultivated for its timber, gum, and aromatic oil. The leaves contain oil glands that produce a distinctive, medicinal fragrance.

## Examples

- The smell of eucalyptus filled the air after the rain.
- Koalas feed almost exclusively on the leaves of certain eucalyptus species, which provide both nutrition and hydration.
- The rapid growth of eucalyptus plantations has made them a valuable source of pulpwood, though their high water consumption and flammable oils can impact local ecosystems.

## Usage notes

- Uncountable when referring to the wood or the scent; countable when referring to specific botanical species or individual trees.

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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.