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Definition of eucalyptus
eucalyptus
/ˌjuː.kəˈlɪp.təs/
eu · ca · lyp · tus
Plural:eucalyptuses
•Adjective:eucalyptic
eucalyptus Lexical Profile
CEFR
B2
Grade
6
Tier
2
Usage
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• noun
1
An evergreen tree or shrub of the myrtle family, native primarily to Australia, characterized by aromatic leaves and widely cultivated for timber, shade, and medicinal oil.
Example
"The koala is famously adapted to survive on a highly specialized diet of eucalyptus leaves."
2
A highly aromatic essential oil extracted from the leaves of the eucalyptus tree, frequently used in medicines, throat lozenges, and aromatherapy.
Example
"She added a few drops of eucalyptus to the steam inhaler to help relieve her sinus congestion."
Synonyms
View all synonyms for eucalyptusWord Origin & Etymology
Coined in the late 18th century from Modern Latin, derived from the Greek words 'eu' (well) and 'kalyptos' (covered). The name refers to the protective bud cap (operculum) that covers the flower before it blooms.
Cite this Entry
Wordmom. (2026). Definition of Eucalyptus. In Wordmom Dictionary. Retrieved Oct 15, 2026, from https://wordmom.com/dictionary/eucalyptus