bluegum
/ˈbluːgʌm/noun
1- a Eucalyptus tree with blue-green aromatic leaves and smooth bark蓝桉。
1.1
- Genus Eucalyptus, family Myrtaceae: several species, in particular E. regnans.桉属, 桃金娘科：数种, 尤指王桉（澳大利亚桉树）。