Definition of eucalyptus noun from the Oxford Advanced Learner's Dictionary



BrE BrE//ˌjuːkəˈlɪptəs//
; NAmE NAmE//ˌjuːkəˈlɪptəs//
[countable, uncountable] (pl. eucalyptuses, eucalypti
BrE BrE//ˌjuːkəˈlɪptaɪ//
; NAmE NAmE//ˌjuːkəˈlɪptaɪ//
(also eucalyptus tree, gum tree) Plants
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a tall straight tree with leaves that produce an oil with a strong smell, that is used in medicine. There are several types of eucalyptus and they grow especially in Australasia. Koalas eat very few things besides eucalyptus leaves. See related entries: Plants Word Originmodern Latin, from Greek eu ‘well’ + kaluptos ‘covered’ (from kaluptein ‘to cover’), because the unopened flower is protected by a cap.
See the Oxford Advanced American Dictionary entry: eucalyptus