zygodactyl
adjective biology specialized uk/ˌzaɪ.ɡəˈdæk.tɪl/ us/ˌzaɪ.ɡəˈdæk.tɪl/
（鸟）对趾的，前后各有一双趾的
(of a bird's foot) having two toes pointing forwards and two toes pointing backwards
the cuckoo's zygodactyl toes 布谷鸟的对趾
zygodactyl
noun [ C ] biology specialized uk/ˌzaɪ.ɡəˈdæk.tɪl/ us/ˌzaɪ.ɡəˈdæk.tɪl/
（鸟的）对趾，前后各有一双趾
a bird's foot that has two toes pointing forwards and two toes pointing backwards, or the bird itself
Woodpeckers have zygodactyls. 啄木鸟有对趾。