deciduous
/dɪˈsɪdʒjʊəs/adjective
1- (of a tree or shrub) shedding its leaves annually（树木, 灌木）每年落叶的。常与EVERGREEN相对。
1.1
- informal (of a tree or shrub) broadleaved〈非正式〉（树木, 灌木）阔叶的。
1.2
- denoting the milk teeth of a mammal, which are shed after a time（乳牙）脱落的。
派生词
deciduously
adverbdeciduousness
noun词源
late 17th cent.: from Latin deciduus （from decidere 'fall down or off'）+-OUS.