invertebrate
noun [ C ] biology specialized uk/ɪnˈvɜː.tɪ.brət/ us/ɪnˈvɝː.t̬ə.brət/
无脊椎动物
an animal with no spine
Invertebrates, such as worms, are the main diet of these water birds. 蠕虫之类的无脊椎动物是这些水鸟的主要食物。
Compare: vertebrate noun