eucalyptus
noun [countable, uncountable](also eucalyptus tree, gum tree)
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. 桉树（尤产于澳大拉西亚） 
Koalas eat very few things besides eucalyptus leaves. 考拉除了桉树叶，吃的东西很少。
Word Originmodern Latin, from Greek eu ‘well’ + kaluptos ‘covered’ (from kaluptein ‘to cover’), because the unopened flower is protected by a cap.
