1. (按季节或生长期)脱落的：decay 衰微,衰弱,衰败,衰弱 | deciduous (按季节或生长期)脱落的 | incidence 影响范围

2. 脱落的：accident 事故,偶然事件 | deciduous 脱落的 | coincide 同时发生

3. 落叶的：Consolidated 固结 | Deciduous 落叶的 | Frigid 高寒

4. 落叶的,脱落的：decaying manure or compost 腐熟的农家肥或堆肥 | deciduous 落叶的,脱落的 | deciduous plant 落叶植物

1. (树、灌木）每年落叶的
A deciduous tree or bush is one that loses its leaves in the autumn every year.

adj

1. (of plants and shrubs) shedding foliage at the end of the growing season

2. (of teeth, antlers, etc.) being shed at the end of a period of growth

e.g. deciduous teeth